The utility model belongs to the technical field of high pressure electrical apparatus testing, in particular to high voltage circuit breaker stroke test testing system based on DSP. Be connected with the permanent magnet through the shaft coupling by linear displacement sensor's the guide arm that moves, the other end of permanent magnet and high voltage circuit breaker's moving contact are connected, and linear displacement sensor is connected with the universal stand, and the universal stand is connected on high voltage circuit breaker, and linear displacement sensor's signal output part is connected through the signal input part of data line with the test system. The utility model discloses can carry out the rapid survey to high voltage circuit breaker's formation, the measurement process need not processed and connect and fixed component, has advantages such as simple structure, easily installation, measurement accuracy height and stability are good. Be fit for detecting the popularization of inspection field and using at power equipment, can improve high -pressure electric appliances's quality, shorten the round of visits, have certain social and economic benefits.