In order to obtain information superiority, the jamming technology of satellite communication link is discussed based on the analysis of satellite communication system situation simulation requirements. The simulation of a geostationary orbit satellite through STK is carried out to verify and compare the feasibility of various jamming methods under the same beam. By using the communication analysis function and simulation external interface of STK software, the simulation design and implementation of communication situation under the condition of satellite beam switching are carried out with Matlab. The results show that the analysis provides a reference for the related simulation research of satellite communication system.