diff --git a/docs/en/guide/schema.md b/docs/en/guide/schema.md
index 4420254..361ec37 100644
--- a/docs/en/guide/schema.md
+++ b/docs/en/guide/schema.md
@@ -77,6 +77,8 @@ interface IElement {
     conceptId?: string;
     prefix?: string;
     postfix?: string;
+    minWidth?: number;
+    underline?: boolean;
     code: string | null;
     min?: number;
     max?: number;
diff --git a/docs/guide/schema.md b/docs/guide/schema.md
index 59a41b0..7201e0c 100644
--- a/docs/guide/schema.md
+++ b/docs/guide/schema.md
@@ -77,6 +77,8 @@ interface IElement {
     conceptId?: string;
     prefix?: string;
     postfix?: string;
+    minWidth?: number;
+    underline?: boolean;
     code: string | null;
     min?: number;
     max?: number;
diff --git a/src/editor/core/draw/Draw.ts b/src/editor/core/draw/Draw.ts
index 0a5220c..7884928 100644
--- a/src/editor/core/draw/Draw.ts
+++ b/src/editor/core/draw/Draw.ts
@@ -1038,6 +1038,8 @@ export class Draw {
     // 列表位置
     let listId: string | undefined
     let listIndex = 0
+    // 控件最小宽度
+    let controlRealWidth = 0
     for (let i = 0; i < elementList.length; i++) {
       const curRow: IRow = rowList[rowList.length - 1]
       const element = elementList[i]
@@ -1311,6 +1313,23 @@ export class Draw {
         metrics,
         style: this._getFont(element, scale)
       })
+      // 暂时只考虑非换行场景：控件开始时统计宽度，结束时消费宽度及还原
+      if (rowElement.control?.minWidth) {
+        if (rowElement.controlComponent) {
+          controlRealWidth += metrics.width
+        }
+        if (rowElement.controlComponent === ControlComponent.POSTFIX) {
+          const extraWidth = rowElement.control.minWidth - controlRealWidth
+          // 消费超出实际最小宽度的长度
+          if (extraWidth > 0) {
+            rowElement.left = extraWidth
+            curRow.width += extraWidth
+          } else {
+            rowElement.left = 0
+          }
+          controlRealWidth = 0
+        }
+      }
       // 超过限定宽度
       const preElement = elementList[i - 1]
       let nextElement = elementList[i + 1]
@@ -1562,20 +1581,27 @@ export class Draw {
           this.textParticle.record(ctx, element, x, y + offsetY)
         }
         // 下划线记录
-        if (element.underline) {
+        if (element.underline || element.control?.underline) {
           const rowMargin =
             defaultBasicRowMarginHeight *
             (element.rowMargin || defaultRowMargin) *
             scale
+          // 元素偏移量
+          const left = element.left || 0
+          // 占位符不参与颜色计算
+          const color =
+            element.controlComponent === ControlComponent.PLACEHOLDER
+              ? undefined
+              : element.color
           this.underline.recordFillInfo(
             ctx,
-            x,
+            x - left,
             y + curRow.height - rowMargin,
-            metrics.width,
+            metrics.width + left,
             0,
-            element.color
+            color
           )
-        } else if (preElement?.underline) {
+        } else if (preElement?.underline || preElement?.control?.underline) {
           this.underline.render(ctx)
         }
         // 删除线记录
diff --git a/src/editor/core/draw/control/Control.ts b/src/editor/core/draw/control/Control.ts
index b8f1704..bdfb90a 100644
--- a/src/editor/core/draw/control/Control.ts
+++ b/src/editor/core/draw/control/Control.ts
@@ -57,7 +57,9 @@ export class Control {
     const editorDataKeys: (keyof IEditorData)[] = ['header', 'main', 'footer']
     editorDataKeys.forEach(key => {
       payload[key] = payload[key].filter(element => {
-        if (element.type !== ElementType.CONTROL) return true
+        if (element.type !== ElementType.CONTROL || element.control?.minWidth) {
+          return true
+        }
         return (
           element.controlComponent !== ControlComponent.PREFIX &&
           element.controlComponent !== ControlComponent.POSTFIX &&
diff --git a/src/editor/core/draw/richtext/AbstractRichText.ts b/src/editor/core/draw/richtext/AbstractRichText.ts
index dcb09a6..809e69c 100644
--- a/src/editor/core/draw/richtext/AbstractRichText.ts
+++ b/src/editor/core/draw/richtext/AbstractRichText.ts
@@ -31,6 +31,8 @@ export abstract class AbstractRichText {
     if (!isFirstRecord && this.fillColor && this.fillColor !== color) {
       this.render(ctx)
       this.clearFillInfo()
+      // 重新记录
+      this.recordFillInfo(ctx, x, y, width, height, color)
       return
     }
     if (isFirstRecord) {
diff --git a/src/editor/core/position/Position.ts b/src/editor/core/position/Position.ts
index e48ae06..7707870 100644
--- a/src/editor/core/position/Position.ts
+++ b/src/editor/core/position/Position.ts
@@ -119,6 +119,10 @@ export class Position {
           element.type === ElementType.LATEX
             ? curRow.ascent - metrics.height
             : curRow.ascent
+        // 偏移量
+        if (element.left) {
+          x += element.left
+        }
         const positionItem: IElementPosition = {
           pageNo,
           index,
@@ -126,6 +130,7 @@ export class Position {
           rowIndex: startRowIndex + i,
           rowNo: i,
           metrics,
+          left: element.left || 0,
           ascent: offsetY,
           lineHeight: curRow.height,
           isFirstLetter: j === 0,
@@ -265,13 +270,14 @@ export class Position {
       const {
         index,
         pageNo,
+        left,
         isFirstLetter,
         coordinate: { leftTop, rightTop, leftBottom }
       } = positionList[j]
       if (positionNo !== pageNo) continue
       // 命中元素
       if (
-        leftTop[0] <= x &&
+        leftTop[0] - left <= x &&
         rightTop[0] >= x &&
         leftTop[1] <= y &&
         leftBottom[1] >= y
diff --git a/src/editor/core/range/RangeManager.ts b/src/editor/core/range/RangeManager.ts
index fbbf222..d268e78 100644
--- a/src/editor/core/range/RangeManager.ts
+++ b/src/editor/core/range/RangeManager.ts
@@ -325,7 +325,9 @@ export class RangeManager {
     const size = curElement.size || this.options.defaultSize
     const bold = !~curElementList.findIndex(el => !el.bold)
     const italic = !~curElementList.findIndex(el => !el.italic)
-    const underline = !~curElementList.findIndex(el => !el.underline)
+    const underline = !~curElementList.findIndex(
+      el => !el.underline && !el.control?.underline
+    )
     const strikeout = !~curElementList.findIndex(el => !el.strikeout)
     const color = curElement.color || null
     const highlight = curElement.highlight || null
diff --git a/src/editor/interface/Control.ts b/src/editor/interface/Control.ts
index 52ab1ad..b0b848c 100644
--- a/src/editor/interface/Control.ts
+++ b/src/editor/interface/Control.ts
@@ -27,6 +27,8 @@ export interface IControlBasic {
   conceptId?: string
   prefix?: string
   postfix?: string
+  minWidth?: number
+  underline?: boolean
 }
 
 export type IControl = IControlBasic &
diff --git a/src/editor/interface/Element.ts b/src/editor/interface/Element.ts
index d85b297..c2eaa18 100644
--- a/src/editor/interface/Element.ts
+++ b/src/editor/interface/Element.ts
@@ -136,6 +136,7 @@ export interface IElementPosition {
   rowNo: number
   ascent: number
   lineHeight: number
+  left: number
   metrics: IElementMetrics
   isFirstLetter: boolean
   isLastLetter: boolean
diff --git a/src/editor/interface/Row.ts b/src/editor/interface/Row.ts
index 19f31de..1c6ecac 100644
--- a/src/editor/interface/Row.ts
+++ b/src/editor/interface/Row.ts
@@ -4,6 +4,7 @@ import { IElement, IElementMetrics } from './Element'
 export type IRowElement = IElement & {
   metrics: IElementMetrics
   style: string
+  left?: number
 }
 
 export interface IRow {
diff --git a/src/mock.ts b/src/mock.ts
index 3ea44b3..03030d7 100644
--- a/src/mock.ts
+++ b/src/mock.ts
@@ -396,9 +396,34 @@ elementList.push(
   ])
 )
 
+// 模拟固定长度下划线
+elementList.push(
+  ...[
+    {
+      value: '患者签名：'
+    },
+    {
+      type: ElementType.CONTROL,
+      value: '',
+      control: {
+        type: ControlType.TEXT,
+        value: null,
+        placeholder: '',
+        prefix: '\u200c',
+        postfix: '\u200c',
+        minWidth: 160,
+        underline: true
+      }
+    }
+  ]
+)
+
 // 模拟结尾文本
 elementList.push(
   ...[
+    {
+      value: '\n'
+    },
     {
       value: '',
       type: ElementType.TAB