Electro-hydraulic valve control displacement module and using method thereof

The invention relates to an electro-hydraulic valve control displacement module and a using method thereof. The electro-hydraulic valve control displacement module comprises a stepping motor, a transmission rod, a feedback connecting rod, a three-position three-way valve, a linear variable differential transformer, a differential cylinder and a differential cylinder sleeve. The stepping motor is in transmission connection with the transmission rod. The differential cylinder sleeve is fixedly connected with the differential cylinder. The top end of the feedback connecting rod is hinged to the three-position three-way valve, and the bottom end of the feedback connecting rod is hinged to the differential cylinder sleeve. The two sides of the feedback connecting rod are hinged to the transmission rod and the linear variable differential transformer respectively. By means of the linear variable differential transformer and the feedback connecting rod, motion information of the stepping motor and the differential cylinder is fed back to a single-chip microcomputer in real time, by means of accurate calculation of the single-chip microcomputer, the displacement relation between the stepping motor and the differential cylinder can be accurately controlled, an operator can control the displacement relation conveniently and accurately, and therefore accurate adjustment is achieved.