http://www.haorooms.com/post/css_input_uploadmh
思路是外层用a标签包裹住，样式自己设置，内层的input[type=file]设置为透明
<a class="lnk-create isay-upload-inp" href="javascript:;">
<input tabindex="2" autocomplete="off" name="image" title="可传多张照片" type="file" multiple="" accept="image/jpg,image/jpeg,image/bmp,image/gif,image/png,">
<i>+</i>发照片
</a>
.photo{position:relative}
.photo .photo-btns{position:absolute;right:0;top:0;50%;text-align:right}
.photo .btn-pic-upload{margin-left:1em;}
.isay-upload-inp{position: relative;cursor: pointer;}
//注意，这里不能填写width
.isay-upload-inp input{position: absolute;opacity: 0;right: 0;cursor: pointer;filter: alpha(opacity=0);}
a.lnk-create{display:inline-block;zoom:1;padding:0 10px 0 10px;vertical-align:baseline;line-height:1.5;height:1.5em;overflow:hidden;border:1px solid #edded4;border-radius:2px;letter-spacing:2px}
a.lnk-create i{display:inline-block;zoom:1;margin-right:4px;font-size:16px;color:#432d0f;vertical-align:baseline;line-height:1;font-style:normal}
a.lnk-create:link,a.lnk-create:visited{color:#777;background:#fcf7f3}
a.lnk-create:active,a.lnk-create:hover{color:#777;background:#fbf4ef;border-color:#e7d2c5}
这就是效果了