With the gradual application of 1553B bus technology in shooting range weapon system test, and in order to solve the problem of telemetry parameter analysis, the data structure and characterics of 1553B bus are expounded. The standard frame format is defined. The parameter analysis of bus data frame is realized bymessage extraction, data frame splitting and reorganization.The practical application of a certain weapon system test proves that this method keeps consistency in frame format and processing flow compared with the original parameter analysis method of telemetry data processing system, which is convenient for the system to achieve functional integration and upgrading.