The utility model provides a pitch zero calibration device for an ADCP installation platform of a verification vehicle. The device comprises an I-shaped connecting rod, a long level and an electromagnet, the long level is installed at one end of the connecting rod, the electromagnet is installed at the other end of the connecting rod, an electric connecting wire is arranged in the connecting rod,one end of the electric connecting wire is connected with the electromagnet, and the end, provided with the electromagnet, of the I-shaped connecting rod is attracted to the upper surface of an installation platform. The pitch zero calibration device for the ADCP mounting platform of the verification vehicle can accurately calibrate the pitch zero of the ADCP mounting platform of the underwater verification vehicle, and is simple in structure and easy to operate.