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In order to solve the problem that it is difficult to accurately detect the angle guidance performance of a high-precision microwave guidance equipment, the hardware circuit structure of the high-precision angle data detection system is studied and built based on the overall architecture of arm + DSP + FPGA. The software and hardware programs of angle data testing are developed under different operating environments based on C / C + +, VHDL and Verilog, The receiving, processing, calculating and measuring of the spatial angle data signal transmitted by the microwave guidance equipment are realized. The results show that the system meets the design function and index requirements, and the azimuth angle of high-precision microwave guidance equipment is better than 0.16 °, The elevation angle is better than 0.18 °, The data word is consistent with the preset information of the equipment, which meets the requirements of high-precision angle data detection, and is of great significance to effectively improve the reliability of the microwave guidance equipment.