Abstract: In different model tasks, the antijamming ability of swing scanning infrared earth sensor in electromagnetic interference environment needs assessment. The structural design of overall structure and the main parts of portable swing scanning infrared earth sensor's whole machine electromagnetic compatibility test dedicated performance testing were introduced in detail. This device is able to assess the performance of the whole earth sensor indicators, gives infrared radiation signal, comprehensive assessment on the optical, mechanical, electrical properties of products. The earth simulator in this paper adopts a project of replaceable earth diaphragm for two orbit heights 35 786 km and 21 500 km, and can afford two earth angles (17.46 and 26.54). In this paper, test equipment achieve simulating the earth of satellites in space have seen on the ground, for the satellite components infrared earth sensor testing performance on the ground.