diff --git a/src/editor/core/cursor/Cursor.ts b/src/editor/core/cursor/Cursor.ts
index edfbd9c..8a7e07b 100644
--- a/src/editor/core/cursor/Cursor.ts
+++ b/src/editor/core/cursor/Cursor.ts
@@ -41,7 +41,7 @@ export class Cursor {
       agentCursorDom.focus()
       agentCursorDom.setSelectionRange(0, 0)
     })
-    // fillText位置 + 文字基线到底部距离  - 模拟光标偏移量
+    // fillText位置 + 文字基线到底部距离 - 模拟光标偏移量
     const descent = metrics.boundingBoxDescent < 0 ? 0 : metrics.boundingBoxDescent
     const cursorTop = (leftTop[1] + ascent) + descent - (cursorHeight - offsetHeight)
     const curosrleft = rightTop[0]
diff --git a/src/editor/core/draw/Draw.ts b/src/editor/core/draw/Draw.ts
index 3029e46..b4ac4ff 100644
--- a/src/editor/core/draw/Draw.ts
+++ b/src/editor/core/draw/Draw.ts
@@ -163,6 +163,7 @@ export class Draw {
     this.position.setPositionList([])
     const positionList = this.position.getPositionList()
     // 基础信息
+    const { defaultSize } = this.options
     const canvasRect = this.canvas.getBoundingClientRect()
     // 绘制背景
     this.background.render(canvasRect)
@@ -180,7 +181,7 @@ export class Draw {
         height: 0,
         ascent: 0,
         elementList: [],
-        rowFlex: this.elementList?.[1].rowFlex
+        rowFlex: this.elementList?.[1]?.rowFlex
       })
     }
     for (let i = 0; i < this.elementList.length; i++) {
@@ -212,7 +213,7 @@ export class Draw {
         this.ctx.font = this.getFont(element)
         const fontMetrics = this.ctx.measureText(element.value)
         metrics.width = fontMetrics.width
-        metrics.boundingBoxAscent = fontMetrics.actualBoundingBoxAscent
+        metrics.boundingBoxAscent = i === 0 ? defaultSize : fontMetrics.actualBoundingBoxAscent
         metrics.boundingBoxDescent = fontMetrics.actualBoundingBoxDescent
       }
       const ascent = metrics.boundingBoxAscent + rowMargin
@@ -342,7 +343,9 @@ export class Draw {
     if (isSubmitHistory) {
       const self = this
       const oldElementList = deepClone(this.elementList)
+      const { startIndex, endIndex } = this.range.getRange()
       this.historyManager.execute(function () {
+        self.range.setRange(startIndex, endIndex)
         self.elementList = deepClone(oldElementList)
         self.render({ curIndex, isSubmitHistory: false })
       })
diff --git a/src/editor/core/event/CanvasEvent.ts b/src/editor/core/event/CanvasEvent.ts
index dd65e9f..fd6f5fb 100644
--- a/src/editor/core/event/CanvasEvent.ts
+++ b/src/editor/core/event/CanvasEvent.ts
@@ -245,7 +245,7 @@ export class CanvasEvent {
 
   public paste(evt: ClipboardEvent) {
     const text = evt.clipboardData?.getData('text')
-    this.input(text || '')
+    this.input(text?.replaceAll(`\n`, ZERO) || '')
     evt.preventDefault()
   }
 
diff --git a/src/editor/index.ts b/src/editor/index.ts
index c3f04aa..5760a70 100644
--- a/src/editor/index.ts
+++ b/src/editor/index.ts
@@ -42,7 +42,7 @@ export default class Editor {
     canvas.height = parseInt(canvas.style.height) * dpr
     canvas.style.cursor = 'text'
     ctx.scale(dpr, dpr)
-    if (elementList[0].value !== ZERO) {
+    if (elementList[0]?.value !== ZERO) {
       elementList.unshift({
         value: ZERO
       })