The fixed pointing multi-beam antenna consists of the main reflector fixed and the feeder system which can move along the inclined orbit to match different satellites, and the main beam point is unique. In contrast to full motion or limited motion antennas, the main reflector surface has high precision surface accuracy, ensure the main beam pointing accuracy and realize the precise positioning of the feed system.This paper proposes a variety of spatial measurement technology including static GPS measurement system, total station measurement system,laser tracker measurement system and digital industrial photographic measurement system.During the installation of a multi-beam antenna, the main reflection surface accuracy is better than ±0.15mm, the main beam pointing accuracy is better than ± 0.0122°, and the feeder system positioning accuracy is better than ±1.5mm, which meets the requirements of the structural installation index. By testing the electrical performance index meets the requirements through the multi-beam antenna system, the characteristics of the feasibility, reliability, high efficiency and high efficiency of the scheme are fully verified.