diff --git a/src/editor/assets/css/index.css b/src/editor/assets/css/index.css
index 0f50964..d976bd2 100644
--- a/src/editor/assets/css/index.css
+++ b/src/editor/assets/css/index.css
@@ -27,6 +27,7 @@
   position: absolute;
   outline: none;
   background-color: #000000;
+  pointer-events: none;
 }
 
 .cursor--animation {
diff --git a/src/editor/core/event/CanvasEvent.ts b/src/editor/core/event/CanvasEvent.ts
index cde7e8c..9e351ce 100644
--- a/src/editor/core/event/CanvasEvent.ts
+++ b/src/editor/core/event/CanvasEvent.ts
@@ -19,6 +19,7 @@ import { HistoryManager } from "../history/HistoryManager"
 import { Listener } from "../listener/Listener"
 import { Position } from "../position/Position"
 import { RangeManager } from "../range/RangeManager"
+import { LETTER_REG, NUMBER_LIKE_REG } from "../../dataset/constant/Regular"
 
 export class CanvasEvent {
 
@@ -62,6 +63,7 @@ export class CanvasEvent {
     this.pageContainer.addEventListener('mousedown', this.mousedown.bind(this))
     this.pageContainer.addEventListener('mouseleave', this.mouseleave.bind(this))
     this.pageContainer.addEventListener('mousemove', this.mousemove.bind(this))
+    this.pageContainer.addEventListener('dblclick', this.dblclick.bind(this))
   }
 
   public setIsAllowDrag(payload: boolean) {
@@ -376,6 +378,49 @@ export class CanvasEvent {
     }
   }
 
+  public dblclick() {
+    const cursorPosition = this.position.getCursorPosition()
+    if (!cursorPosition) return
+    const { value, index } = cursorPosition
+    const elementList = this.draw.getElementList()
+    // 判断是否是数字或英文
+    let upCount = 0
+    let downCount = 0
+    const isNumber = NUMBER_LIKE_REG.test(value)
+    if (isNumber || LETTER_REG.test(value)) {
+      // 向上查询
+      let upStartIndex = index - 1
+      while (upStartIndex > 0) {
+        const value = elementList[upStartIndex].value
+        if ((isNumber && NUMBER_LIKE_REG.test(value)) || (!isNumber && LETTER_REG.test(value))) {
+          upCount++
+          upStartIndex--
+        } else {
+          break
+        }
+      }
+      // 向下查询
+      let downStartIndex = index + 1
+      while (downStartIndex < elementList.length) {
+        const value = elementList[downStartIndex].value
+        if ((isNumber && NUMBER_LIKE_REG.test(value)) || (!isNumber && LETTER_REG.test(value))) {
+          downCount++
+          downStartIndex++
+        } else {
+          break
+        }
+      }
+    }
+    // 设置选中区域
+    this.range.setRange(index - upCount - 1, index + downCount)
+    // 刷新文档
+    this.draw.render({
+      isSubmitHistory: false,
+      isSetCursor: false,
+      isComputeRowList: false
+    })
+  }
+
   public input(data: string) {
     const isReadonly = this.draw.isReadonly()
     if (isReadonly) return
diff --git a/src/editor/core/position/Position.ts b/src/editor/core/position/Position.ts
index 0ac401d..3d51906 100644
--- a/src/editor/core/position/Position.ts
+++ b/src/editor/core/position/Position.ts
@@ -148,8 +148,8 @@ export class Position {
         const isHead = x < this.options.margins[3]
         // 是否在头部
         if (isHead) {
-          const headIndex = positionList.findIndex(p => p.rowNo === firstLetterList[j].rowNo)
-          curPositionIndex = ~headIndex ? headIndex : index
+          const headIndex = positionList.findIndex(p => p.pageNo === curPageNo && p.rowNo === firstLetterList[j].rowNo)
+          curPositionIndex = ~headIndex ? headIndex - 1 : index
         } else {
           curPositionIndex = index
         }
diff --git a/src/editor/dataset/constant/Regular.ts b/src/editor/dataset/constant/Regular.ts
new file mode 100644
index 0000000..63be9dd
--- /dev/null
+++ b/src/editor/dataset/constant/Regular.ts
@@ -0,0 +1,4 @@
+export const NUMBER_REG = /[0-9]/
+export const LETTER_REG = /[a-zA-Z]/
+export const NUMBER_LIKE_REG = /[0-9.]/
+export const CHINESE_REG = /[\u4e00-\u9fa5]/
\ No newline at end of file
diff --git a/src/editor/utils/clipboard.ts b/src/editor/utils/clipboard.ts
index 23ce309..e074888 100644
--- a/src/editor/utils/clipboard.ts
+++ b/src/editor/utils/clipboard.ts
@@ -39,5 +39,5 @@ export function writeTextByElementList(elementList: IElement[]) {
   }
   pickTextFromElement(elementList)
   if (!text) return
-  writeText(text)
+  writeText(text.replace(new RegExp(`^${ZERO}`), ''))
 }
\ No newline at end of file