diff --git a/lib/pen.js b/lib/pen.js
index a83f060..4bfed02 100644
--- a/lib/pen.js
+++ b/lib/pen.js
@@ -196,15 +196,15 @@ export default class Painter {
         }
         const fontWeight = view.css.fontWeight === 'bold' ? 'bold' : 'normal';
         const textStyle = view.css.textStyle === 'italic' ? 'italic' : 'normal';
-        view.css.fontSize = view.css.fontSize ? view.css.fontSize : '20rpx';
+        const fontSize = view.css.fontSize ? view.css.fontSize.toPx() : '20rpx'.toPx();
         this.ctx.font = `${textStyle} ${fontWeight} ${view.css.fontSize.toPx()}px ${view.css.fontFamily ? view.css.fontFamily : 'sans-serif'}`;
-        // this.ctx.setFontSize(view.css.fontSize.toPx());
         // 计算行数
         let lines = 0;
         const linesArray = [];
         for (let i = 0; i < textArray.length; ++i) {
           const textLength = this.ctx.measureText(textArray[i]).width;
-          const partWidth = view.css.width ? view.css.width.toPx(false, this.style.width) - paddings[1] - paddings[3] : textLength;
+          let partWidth = view.css.width ? view.css.width.toPx(false, this.style.width) - paddings[1] - paddings[3] : textLength;
+          partWidth = partWidth > fontSize ? partWidth - partWidth % fontSize + fontSize : fontSize
           const calLines = Math.ceil(textLength / partWidth);
           // 取最长的作为 width
           width = partWidth > width ? partWidth : width;
@@ -547,7 +547,7 @@ export default class Painter {
       }
       let lineIndex = 0;
       for (let j = 0; j < textArray.length; ++j) {
-        const preLineLength = Math.ceil(textArray[j].length / linesArray[j]);
+        const preLineLength = Math.floor(textArray[j].length / linesArray[j]);
         let start = 0;
         let alreadyCount = 0;
         for (let i = 0; i < linesArray[j]; ++i) {