GPS attitude determination technology can calculate the attitude of carrier according to the basal plane from multi-antenna array on it. Through emulating the signal of multi-antenna array which can reflect its carrier’s attitude, and arranging these data to observe-files for attitude determination, the test on attitude determination receiver can be more easy and agile. The theory of the system is put forward， simulation and test under the circumstance of static and dynamic are performed. Simulation results show that the standard deviations of three-dimensional angles are below 0.2°, which accords well to the actual situation.