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In the process of test and diagnosis, the test equipment for execution component in a certain airborne weapon control system needs complex operation and manual troubleshooting, so the efficiency of test and diagnosis is low. To improve test efficiency, a new test equipment for executing component in a certain airborne weapon control system is designed. First, According to the test requirement based on the relationship with input and output of the executing component, The system structure and working principle of the test equipment are designed. Then, The circuit of test system based on STC89C51 microcontroller which has the function of receiving and sending eight-channel switching signal is built. and the software baed on keil development environment for the STC89C51 microcontroller is designed wih C-language, which contains test and diagnostic modules. Last, The multi-channel test technology and fault dictionary method are used, the execution component failures are set, and all possible test conditions through the key control module of the test equipment are simulated. All of above verify the validity of the test equipment. The practical application shows that the test equipment can automatically locate faults to the component level and effectively improve the efficiency of test and diagnosis.