As the representative of the most advanced aeroelectronic technique of the active aircrafts,the design complexity of high speed data bus is apparently.How to investgate its whole performance is an very important problem.The network testing software presented in this paper supplies an effective method,then the test and demonstration of the performance of the LTPB network are realized.On one hand,the reasonableness of the design of the software itself is proved,and on other hand,the exactitude of the design and the enforcement of the whole LTPB are proved also.