In modern warfare,a large amount of command and control and intelligence information is transmitted through satellites.The anti-jamming ability of satellite communication earth stations is the basis for ensuring the smooth flow of information.As for the case that multiple small earth stations cannot communicate due to jamming,the Minimum Variance Distortionless Response (MVDR) algorithm based on the reflector antenna array is proposed.Firstly,the elements of antennas at satellite communication earth stations are analyzed,the gain expression of the reflector antenna is given,and a mathematical model for the reception of signals by the reflector antenna array is established.Then,the mechanism of the MVDR improvement algorithm for beamforming is studied,the calculation formulas for the output Signal to Interference plus Noise Ratio (SINR) and optimal weight vector of the reflector antenna array are derived,the reasons for the poor anti-jamming effect of uniform linear arrays at certain angles are analyzed,and a linear array whose deployment approximates the minimum redundant array with mutually prime element positions is proposed to address this issue.Finally,the effectiveness of the proposed algorithm in improving the anti-jamming performance of the array is verified through multiple simulation experiments.The simulation results show that the proposed algorithm can improve the satellite direction gain of the reflector antenna array,increase the output SINR of the array,and effectively suppress the downlink jamming of satellite communication.