在ueditor文件夹下有两个js文件，分别是ueditor.all.js和ueditor.all.min.js

打开这两个文件，找到如下代码：

//设置默认字体和字号
//font-family不能呢随便改，在safari下fillchar会有解析问题
'body{margin:8px;font-family:sans-serif;font-size:16px;}' +

将其中sans-serif修改为SimSun：

//设置默认字体和字号
//font-family不能呢随便改，在safari下fillchar会有解析问题
'body{margin:8px;font-family:SimSun;font-size:16px;}' +

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ueditor.config.js文件中可以修改你想要展示的字体，请看如下代码：

 //fontfamily//字体设置 label留空支持多语言自动切换，若配置，则以配置值为准//,'fontfamily':[//    { label:'',name:'songti',val:'宋体,SimSun'},//    { label:'',name:'kaiti',val:'楷体,楷体_GB2312, SimKai'},//    { label:'',name:'yahei',val:'微软雅黑,Microsoft YaHei'},//    { label:'',name:'heiti',val:'黑体, SimHei'},//    { label:'',name:'lishu',val:'隶书, SimLi'},//    { label:'',name:'andaleMono',val:'andale mono'},//    { label:'',name:'arial',val:'arial, helvetica,sans-serif'},//    { label:'',name:'arialBlack',val:'arial black,avant garde'},//    { label:'',name:'comicSansMs',val:'comic sans ms'},//    { label:'',name:'impact',val:'impact,chicago'},//    { label:'',name:'timesNewRoman',val:'times new roman'}//]

你如果只想要某一字体，把对应的注释放开即可。