1.新建一个文本文件，重命名为web.config，复制下面的代码进去，然后把这个文件上传到网站根目录即可

<?xml version="1.0" encoding="UTF-8"?>

 <configuration>

    <system.webServer>

 <rewrite>

  <rules>

  <rule name="OrgPage" stopProcessing="true">

  <match url="^(.*)$" />

  <conditions logicalGrouping="MatchAll">

  <add input="{HTTP_HOST}" pattern="^(.*)$" />

  <add input="{REQUEST_FILENAME}" matchType="IsFile" negate="true" />

  <add input="{REQUEST_FILENAME}" matchType="IsDirectory" negate="true" />

  </conditions>

  <action type="Rewrite" url="index.php/{R:1}" />

  </rule>

  </rules>

 </rewrite>

        <directoryBrowse enabled="false" />

                <security>

          <requestFiltering allowDoubleEscaping="True" />

        </security>

        <defaultDocument>

            <files>

                <clear />

                <add value="index.php" />

                <add value="Default.htm" />

                <add value="Default.asp" />

                <add value="index.htm" />

                <add value="index.html" />

                <add value="iisstart.htm" />

            </files>

        </defaultDocument>

    </system.webServer>

 </configuration>