High-precision gravity measurement is an important observation method for inertial navigation, geodesy, space science, ocean exploration, and basic physics research. High-precision gravimeter has always been the goal pursued by scientific research. Atom interferometry gravimeter can provide absolute gravity acceleration of uGal magnitude. It is one of the most significant instruments to obtain high precision gravity information. The design and implementation of its compact laser system is of great significance for its practicality and commercialization. Firstly, the output requirements of atom interferometry gravimeter laser system are introduced, and then the related research and development of compact laser system at home and abroad are reviewed, and the implementation schemes and development status of two kinds of light source systems based on free space and optical fiber transmission are introduced respectively, with emphasis on its key technologies such as frequency stabilization, frequency hopping, power stabilization and so on. Finally, the compact laser system of atom interferometry gravimeter is summarized and prospected.