如果你想要免费的绘图工具可以在触摸屏上使用,我推荐使用Fabric.js: 演示 教程 代码: <canvas id="c1" width="100" height="100" style="border:1px solid black;"> </canvas> var canvas = new fabric.Canvas('c1'); canvas.isDrawingMode = true; canvas.freeDrawingBrush.width = 5; console.log(canvas); 请查看JSfiddle