做一个半梯形形状的div

.form_title_div{
	width:100px; font-size: 18px; border-right: 23px solid transparent; border-bottom: 23px solid #3DAEE9; border-bottom-color: #3DAEE9;
       border-top-left-radius: 5px;-webkit-border-left-radius: 5px;//第二个图片要加上这个做圆角
}
.form_title_div span{
	display: block; margin-bottom: -130px; margin-left: 15px; color: #ffffff;
}

<div class="form_title_div" style="float: left;">
   <span>注册信息</span>
</div>