With the popularization and application of Beidou compatible positioning equipment, using the traditional test by verification network method is not easy due to climate change,multi-path,high cost,poor repeatability,controllability and so on,This is inconvenient to evaluate the accuracy and performance.So,This paper proposes the method of GNSS signal simulator testing satellite positioning module accuracy.By studying the feasibility of this method and verifying its correctness,we open up a new avenues for dynamic precision verification and evaluation of GNSS receiving equipment experiment indoor.The result shows that the method is reliable,and convenient,It can be used as satellite positioning equipment precision test method with practical significance.