The anechoic chamber provides a comprehensive and effective test environment for the anti-jamming test ofsatellite navigation receiver, which greatly improves the quantitative test and evaluation of anti-jamming capability. However, thequiet zone performance, structural size, antenna layout and other factors of the anechoic chamber will affect the anti-jammingcapability test results. Based on the antenna receiving model of multipath signals, equivalent model of array wave path difference andthe mapping model of signal to antenna, the influence of jamming multipath signal, near-field effect under limited distance anddirection error of incoming wave on anti-jamming test results is quantitatively analyzed by simulation. The results show that theimprovement of the quiet zone performance of anechoic chamber can reduce the deviation of the jamming multipath signals to thenull position; different anechoic chamber sizes correspond to different null depth tests, a compromise should be made based on thetesting requirements; and the anechoic chamber antennas should be laid according to the preset tested array antenna and the testscenario. The results can provide reference for anechoic chamber design, anti-jamming testing plan and testing result analysis, andimprove the credibility of anti-jamming test.