The invention discloses a data acquisition card interface conversion module, which comprises a relay control circuit, an electric shock on-off circuit, a power consumption current and loop voltage module, a cable interface module, a data acquisition card and an upper computer, wherein the relay control circuit, the electric shock on-off circuit and the power consumption current and loop voltage module are respectively connected with the cable interface module, the cable interface module is connected with the data acquisition card, and the data acquisition card is connected with the computer; external data signals are respectively guided into the relay control circuit, the electric shock on-off circuit, the power consumption current and loop voltage module; the relay control circuit is usedfor receiving signals for controlling action states of a relay in the external data signals, the electric shock on-off circuit is used for detecting release voltage characteristic tests, and the power consumption current and loop voltage module is used for detecting power consumption of a contactor. According to data acquisition card interface conversion module disclosed by the invention, the external data signals are classified and sent into the upper computer, so that processing load of the upper computer is reduced, and antijamming capacity is improved.