diff --git a/apps/web/src/pages/editing-planner/components/TimelinePanel.tsx b/apps/web/src/pages/editing-planner/components/TimelinePanel.tsx
index 64d3f961a..2a2f6f87f 100644
--- a/apps/web/src/pages/editing-planner/components/TimelinePanel.tsx
+++ b/apps/web/src/pages/editing-planner/components/TimelinePanel.tsx
@@ -11,6 +11,24 @@
 import React, { useState, useRef, useCallback, useEffect, useLayoutEffect, useMemo } from "react"
 import type { ClipData, ClipType, TrimConfig } from "../types"
 import { TRANSITION_OPTIONS } from "@/api/template-editor"
+import {
+  CLIP_TYPE_ICONS,
+  CLIP_TYPE_LABELS,
+  DEFAULT_PIXELS_PER_SECOND,
+  MIN_PIXELS_PER_SECOND,
+  MAX_PIXELS_PER_SECOND,
+  ZOOM_STEP,
+  MIN_CLIP_WIDTH,
+  ADD_PICKER_WIDTH,
+  TRACK_GAP,
+  MIN_TRIM_DURATION,
+  DEFAULT_ADD_DURATION,
+  MIN_ADD_DURATION,
+  MAX_ADD_DURATION,
+  MIN_TRACK_WIDTH,
+  getRulerStep,
+} from "../constants/timeline"
+import { formatTime, formatTrimTime, generateRulerMarks } from "../utils/timeline"
 
 interface TimelinePanelProps {
   clips: ClipData[]
@@ -38,18 +56,6 @@ interface TimelinePanelProps {
   totalDuration?: number
 }
 
-/** 片段类型图标 */
-const CLIP_TYPE_ICONS: Record<ClipType, string> = {
-  voice: "🎙️",
-  pip: "🖼️",
-}
-
-/** 片段类型标签 */
-const CLIP_TYPE_LABELS: Record<ClipType, string> = {
-  voice: "口播",
-  pip: "混剪",
-}
-
 /** 裁剪拖拽方向 */
 type TrimDirection = "left" | "right"
 
@@ -135,7 +141,7 @@ const TimelinePanel: React.FC<TimelinePanelProps> = ({
 
   /* ── "+" 卡片：类型+时长选择状态 ── */
   const [addType, setAddType] = useState<ClipType>(defaultAddType)
-  const [addDuration, setAddDuration] = useState<number>(5)
+  const [addDuration, setAddDuration] = useState<number>(DEFAULT_ADD_DURATION)
 
   /* ── 模式切换时自动同步默认添加类型 ── */
   useEffect(() => {
@@ -144,21 +150,17 @@ const TimelinePanel: React.FC<TimelinePanelProps> = ({
     }
   }, [currentMode, addType, availableTypes, defaultAddType])
 
-  /* ── 面板尺寸 ── */
-  const PICKER_W = 240
-  const GAP = 6
-
   /* ── 计算 picker 初始位置 ── */
   const updatePickerPosition = useCallback(() => {
     if (!addCardRef.current) return
     const rect = addCardRef.current.getBoundingClientRect()
     const vw = window.innerWidth
     const roughHeight = 180
-    let top = rect.top - GAP - roughHeight
+    let top = rect.top - TRACK_GAP - roughHeight
     if (top < 8) top = 8
     let right = vw - rect.right
-    if (rect.right - PICKER_W < 8) {
-      right = vw - PICKER_W - 8
+    if (rect.right - ADD_PICKER_WIDTH < 8) {
+      right = vw - ADD_PICKER_WIDTH - 8
     }
     setPickerPos({ top, right })
   }, [])
@@ -181,9 +183,9 @@ const TimelinePanel: React.FC<TimelinePanelProps> = ({
     const pickerH = pickerEl.offsetHeight
     const vh = window.innerHeight
     const vw = window.innerWidth
-    let top = addRect.top - GAP - pickerH
+    let top = addRect.top - TRACK_GAP - pickerH
     if (top < 8) {
-      top = addRect.bottom + GAP
+      top = addRect.bottom + TRACK_GAP
       if (top + pickerH > vh - 8) {
         top = vh - 8 - pickerH
         if (top < 8) top = 8
@@ -192,7 +194,7 @@ const TimelinePanel: React.FC<TimelinePanelProps> = ({
     let right = vw - addRect.right
     const pickerRect = pickerEl.getBoundingClientRect()
     if (pickerRect.left < 8) {
-      right = vw - PICKER_W - 8
+      right = vw - ADD_PICKER_WIDTH - 8
     }
     setPickerPos({ top, right })
   }, [showAddPicker])
@@ -224,7 +226,7 @@ const TimelinePanel: React.FC<TimelinePanelProps> = ({
   }, [contextMenu])
 
   /* ── 缩放 & 时长 ── */
-  const pps = pixelsPerSecond ?? 40
+  const pps = pixelsPerSecond ?? DEFAULT_PIXELS_PER_SECOND
   const totalDuration = totalDurationProp ?? clips.reduce((s, c) => s + c.duration, 0)
 
   /* ── 播放头拖拽全局 mousemove/mouseup ── */
@@ -344,11 +346,9 @@ const TimelinePanel: React.FC<TimelinePanelProps> = ({
   useEffect(() => {
     if (!trimDrag) return
 
-    const PX_PER_SECOND = pixelsPerSecond ?? 40 // 与缩放级别同步
-
     const handleMouseMove = (e: MouseEvent) => {
       const dx = e.clientX - trimDrag.startX
-      const dtSec = dx / PX_PER_SECOND
+      const dtSec = dx / pps
       const clip = clips.find((c) => c.id === trimDrag.clipId)
       if (!clip) return
 
@@ -359,10 +359,13 @@ const TimelinePanel: React.FC<TimelinePanelProps> = ({
 
       if (trimDrag.direction === "left") {
         // 左手柄：调整入点
-        newStart = Math.max(0, Math.min(origTrim.start_time + dtSec, newEnd - 1))
+        newStart = Math.max(0, Math.min(origTrim.start_time + dtSec, newEnd - MIN_TRIM_DURATION))
       } else {
         // 右手柄：调整出点
-        newEnd = Math.max(origTrim.start_time + 1, Math.min(origTrim.end_time + dtSec, origDur))
+        newEnd = Math.max(
+          origTrim.start_time + MIN_TRIM_DURATION,
+          Math.min(origTrim.end_time + dtSec, origDur),
+        )
       }
 
       const newDuration = Math.round((newEnd - newStart) * 10) / 10
@@ -396,7 +399,7 @@ const TimelinePanel: React.FC<TimelinePanelProps> = ({
       document.removeEventListener("mousemove", handleMouseMove)
       document.removeEventListener("mouseup", handleMouseUp)
     }
-  }, [trimDrag, trimPreview, clips, onClipTrim, pixelsPerSecond])
+  }, [trimDrag, trimPreview, clips, onClipTrim, pps])
 
   /* ── 右键菜单 ── */
   const handleContextMenu = useCallback((e: React.MouseEvent, clipId: string) => {
@@ -429,23 +432,9 @@ const TimelinePanel: React.FC<TimelinePanelProps> = ({
   }, [contextMenu, onClipRemove])
 
   /* ── 时间标尺 ── */
-  const trackWidth = Math.max(totalDuration * pps, 300)
-  const rulerMarks: number[] = []
-  const step = totalDuration <= 30 ? 5 : totalDuration <= 60 ? 10 : 15
-  for (let t = 0; t <= totalDuration + step; t += step) {
-    rulerMarks.push(t)
-  }
-
-  const formatTime = (sec: number) => {
-    const m = Math.floor(sec / 60)
-    const s = Math.floor(sec % 60)
-    return `${m}:${s.toString().padStart(2, "0")}`
-  }
-
-  /** 格式化裁剪时间（精确到0.1秒） */
-  const formatTrimTime = (sec: number) => {
-    return `${sec.toFixed(1)}s`
-  }
+  const trackWidth = Math.max(totalDuration * pps, MIN_TRACK_WIDTH)
+  const step = getRulerStep(totalDuration)
+  const rulerMarks = generateRulerMarks(totalDuration, step)
 
   return (
     <div className="ep-timeline-area">
@@ -460,7 +449,7 @@ const TimelinePanel: React.FC<TimelinePanelProps> = ({
           <div className="ep-timeline-zoom">
             <button
               className="ep-zoom-btn"
-              onClick={() => onZoomChange?.(Math.max(10, pps - 10))}
+              onClick={() => onZoomChange?.(Math.max(MIN_PIXELS_PER_SECOND, pps - ZOOM_STEP))}
               title="缩小"
             >
               −
@@ -468,15 +457,15 @@ const TimelinePanel: React.FC<TimelinePanelProps> = ({
             <input
               type="range"
               className="ep-zoom-slider"
-              min={10}
-              max={120}
+              min={MIN_PIXELS_PER_SECOND}
+              max={MAX_PIXELS_PER_SECOND}
               step={5}
               value={pps}
               onChange={(e) => onZoomChange?.(Number(e.target.value))}
             />
             <button
               className="ep-zoom-btn"
-              onClick={() => onZoomChange?.(Math.min(120, pps + 10))}
+              onClick={() => onZoomChange?.(Math.min(MAX_PIXELS_PER_SECOND, pps + ZOOM_STEP))}
               title="放大"
             >
               +
@@ -567,7 +556,7 @@ const TimelinePanel: React.FC<TimelinePanelProps> = ({
 
                   <div
                     className={`ep-clip-card ${selectedClipId === clip.id ? "selected" : ""} ${dragIdx === idx ? "dragging" : ""} ${dragOverIdx === idx ? "drag-over" : ""} ${hasTrim ? "trimmed" : ""}`}
-                    style={{ width: Math.max(clip.duration * pps, 60) }}
+                    style={{ width: Math.max(clip.duration * pps, MIN_CLIP_WIDTH) }}
                     draggable={!trimDrag}
                     onDragStart={(e) => handleDragStart(e, idx)}
                     onDragOver={(e) => handleDragOver(e, idx)}
@@ -751,11 +740,16 @@ const TimelinePanel: React.FC<TimelinePanelProps> = ({
             <input
               type="number"
               className="ep-duration-input"
-              min={1}
-              max={120}
+              min={MIN_ADD_DURATION}
+              max={MAX_ADD_DURATION}
               value={addDuration}
               onChange={(e) =>
-                setAddDuration(Math.max(1, Math.min(120, Number(e.target.value) || 1)))
+                setAddDuration(
+                  Math.max(
+                    MIN_ADD_DURATION,
+                    Math.min(MAX_ADD_DURATION, Number(e.target.value) || MIN_ADD_DURATION),
+                  ),
+                )
               }
             />
             <span className="ep-add-clip-duration-unit">秒</span>
diff --git a/apps/web/src/pages/editing-planner/constants/timeline.ts b/apps/web/src/pages/editing-planner/constants/timeline.ts
new file mode 100644
index 000000000..c93de9812
--- /dev/null
+++ b/apps/web/src/pages/editing-planner/constants/timeline.ts
@@ -0,0 +1,56 @@
+import type { ClipType } from "../types"
+
+/** 片段类型图标 */
+export const CLIP_TYPE_ICONS: Record<ClipType, string> = {
+  voice: "🎙️",
+  pip: "🖼️",
+}
+
+/** 片段类型标签 */
+export const CLIP_TYPE_LABELS: Record<ClipType, string> = {
+  voice: "口播",
+  pip: "混剪",
+}
+
+/** 默认缩放：每秒像素数 */
+export const DEFAULT_PIXELS_PER_SECOND = 40
+
+/** 最小缩放 */
+export const MIN_PIXELS_PER_SECOND = 10
+
+/** 最大缩放 */
+export const MAX_PIXELS_PER_SECOND = 120
+
+/** 缩放步长 */
+export const ZOOM_STEP = 10
+
+/** 片段卡片最小宽度（px） */
+export const MIN_CLIP_WIDTH = 60
+
+/** 添加面板宽度（px） */
+export const ADD_PICKER_WIDTH = 240
+
+/** 轨道间距（px） */
+export const TRACK_GAP = 6
+
+/** 最小裁剪时长（秒） */
+export const MIN_TRIM_DURATION = 1
+
+/** 默认添加时长（秒） */
+export const DEFAULT_ADD_DURATION = 5
+
+/** 最小添加时长（秒） */
+export const MIN_ADD_DURATION = 1
+
+/** 最大添加时长（秒） */
+export const MAX_ADD_DURATION = 120
+
+/** 轨道最小宽度（px） */
+export const MIN_TRACK_WIDTH = 300
+
+/** 时间标尺刻度计算：根据总时长返回刻度步长（秒） */
+export const getRulerStep = (totalDuration: number): number => {
+  if (totalDuration <= 30) return 5
+  if (totalDuration <= 60) return 10
+  return 15
+}
diff --git a/apps/web/src/pages/editing-planner/utils/timeline.ts b/apps/web/src/pages/editing-planner/utils/timeline.ts
new file mode 100644
index 000000000..d0bd0b97c
--- /dev/null
+++ b/apps/web/src/pages/editing-planner/utils/timeline.ts
@@ -0,0 +1,20 @@
+/** 格式化时间为 mm:ss */
+export const formatTime = (sec: number): string => {
+  const m = Math.floor(sec / 60)
+  const s = Math.floor(sec % 60)
+  return `${m}:${s.toString().padStart(2, "0")}`
+}
+
+/** 格式化裁剪时间（精确到 0.1 秒） */
+export const formatTrimTime = (sec: number): string => {
+  return `${sec.toFixed(1)}s`
+}
+
+/** 生成时间标尺刻度 */
+export const generateRulerMarks = (totalDuration: number, step: number): number[] => {
+  const marks: number[] = []
+  for (let t = 0; t <= totalDuration + step; t += step) {
+    marks.push(t)
+  }
+  return marks
+}
diff --git a/apps/web/src/test/pages/editing-planner/smoke.test.tsx b/apps/web/src/test/pages/editing-planner/smoke.test.tsx
index 772e58786..1ef59fc39 100644
--- a/apps/web/src/test/pages/editing-planner/smoke.test.tsx
+++ b/apps/web/src/test/pages/editing-planner/smoke.test.tsx
@@ -10,9 +10,11 @@ import "@/pages/editing-planner/EditingPlanner"
 
 // 常量
 import "@/pages/editing-planner/constants"
+import "@/pages/editing-planner/constants/timeline"
 
 // 工具函数
 import "@/pages/editing-planner/utils/selectors"
+import "@/pages/editing-planner/utils/timeline"
 
 // 子组件
 import "@/pages/editing-planner/components/BgmSelector"