先看一下效果： 链接

代码：

<svg version="1.1" id="loader-1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px"
      y="0px" width="40px" height="40px" viewBox="0 0 40 40" enable-background="new 0 0 40 40" xml:space="preserve">
      <path opacity="0.2" fill="#000" d="M20.201,5.169c-8.254,0-14.946,6.692-14.946,14.946c0,8.255,6.692,14.946,14.946,14.946
    s14.946-6.691,14.946-14.946C35.146,11.861,28.455,5.169,20.201,5.169z M20.201,31.749c-6.425,0-11.634-5.208-11.634-11.634
    c0-6.425,5.209-11.634,11.634-11.634c6.425,0,11.633,5.209,11.633,11.634C31.834,26.541,26.626,31.749,20.201,31.749z" />
      <path fill="#000" d="M26.013,10.047l1.654-2.866c-2.198-1.272-4.743-2.012-7.466-2.012h0v3.312h0
    C22.32,8.481,24.301,9.057,26.013,10.047z">
        <animateTransform attributeType="xml" attributeName="transform" type="rotate" from="0 20 20" to="360 20 20" dur="0.5s"
          repeatCount="indefinite" />
      </path>
    </svg>

<path fill="#000" d="M26.013,10.047l1.654-2.866c-2.198-1.272-4.743-2.012-7.466-2.012h0v3.312h0
    C22.32,8.481,24.301,9.057,26.013,10.047z">

path中的d属性中，包含了四个点的坐标：（自己看人家的代码，没有实践，坐标太多，头疼！ ‘-.-’）

第一个点：M26.013,10.047第二个点：l1.654-2.866贝塞尔曲线：c-2.198-1.272-4.743-2.012第三个点：h0v3.312贝塞尔曲线：C22.32,8.481,24.301,9.057第四个点：26.013,10.047

颜色设置CSS：

svg path,
svg rect {
  fill: #FF6700;
}