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Beidou I^st has bad performance in concealment and real-time positioning. In order to achieve the performance evaluation of Beidou navigation signal, relative to the previous form of hardware, such as hardware receiver, spectrum analyzer, and vector network analyzer, etc., the passage puts forward a method of software receiver to evaluate performance of Beidou navigation signals. First, the significance, content and method of performance evaluation were presented, and the form of software receiver was used to evaluate. Then, key technology for performance evaluation of new BDS signal was studied, and a procedure for acquisition and tracking was given and tested on Linux high performance cluster system at last , as well as parameter calculation. Experiments show that the evaluation can be realized with good effect；evaluation contents、index are easy to adjust and promotion for algorithm、 parameters testing of software is convenient; and can provide the certain basis for satellite navigation signal in subsequent evaluation and algorithm test.