The invention provides a system for implementing an igmpsnooping protocol in a vxworks system. The system comprises: a CFG submodule used for handling configuration related operations of the igmpsnooping protocol; and a TimerExpiry submodule having two port sets in a state machine of the module; a Packet Process module for receiving an IGMP message and performing corresponding processing accordingto the message type; an Event Handler module mainly responsible for responding to changes in the network topology; and an Igmpsnooping Operation module mainly used for performing internal operationson a switching chip and a vxworks operating system. After the system implements the igmpsnooping protocol in the vxworks system, the system can be widely applied to the such fields as communications,military, aerospace and aerospace, and has better reliability and real-time performance than linux.