A method and an apparatus for running an applet are provided. The method includes: reading, in response to issuing an applet to a host application, a configuration file to determine a dynamic library referenced by the applet; loading the dynamic library referenced by the applet from a sandbox directory and/or an applet platform; and running, in response to a running instruction of the applet, a script code of the applet to call the dynamic library referenced by the applet. When the applet is run, the dynamic library referenced by the applet is loaded from the sandbox directory and/or the applet platform, and the dynamic library is no longer integrated into the applet package.