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In order to realize the interconnection between different network segments of the informatized launch platform control system, a multi-protocol gateway which can analyze, filter and forward the protocol data of Ethernet, CAN and so on was realized. The controller architecture of DSP+FPGA was used, and six CAN controllers was implemented by reusing CAN IP core inside the FPGA. Within the FPGA, a Microblaze core with the lwIP Ethernet protocol stack running on it was realized to realize the function of Ethernet controller. As the control core, the DSP receives and transmits Ethernet data and CAN data by calling the API function provide by the FPGA, and analyzes, filters and forwards the received data according to specific forwarding strategy. The multi-protocol gateway has various and numerous communication interfaces, and the test results show that it is strongly real-time and highly reliable. Because the analyze and forward strategy is programmable, the gateway can meet the various requirements of different systems.