In order to improve the operation efficiency of the satellite communication network, simulation platform for satellite gateway deployment based on Matlab and STK has been designed. Satellite constellation simulation, information gate station coverage and visibility judgment model have been established, which can realize the simulation of low-orbit satellite constellation space and ground segment. The simulation platform can set different satellite constellation and ground station location parameters according to actual needs, which is used to evaluate the visibility of ground station and satellite. The simulation results show that the platform can effectively support the analysis of ground station deployment scheme. It can provide reference for the overall ground design of low orbit satellite communication system.