The present invention discloses a breaker contact engagement depth measurement device equipped with a reasonable structure and capable of guaranteeing measurement precision. The measurement device comprises six sets of displacement sensors which are arranged in the counterbore holes inside six moving contacts of A, B and C phases of a handcart type breaker of a high voltage switch cabinet respectively, the power lines and the signal lines are led out from the surrounding gaps of a tulip contact, are led out of the high voltage switch cabinet from the space of the handcart type breaker to be connected with the a data processing device, and the data processing device is connected with a display device. The breaker contact engagement depth measurement device equipped with the reasonable structure and capable of guaranteeing the measurement precision of the present invention is reasonable in structure, and is convenient and accurate to measure.