Method of controlling hydraulic valve to be reversed through electric control system

The invention discloses a method of controlling a hydraulic valve to be reversed through an electric control system. The method comprises the following steps that A, a mounting block is mounted at one end, penetrated by a valve core, of a valve body, a threaded rod is rotationally mounted at one end, penetrating out of the valve body, of the valve core, one end of the threaded rod is matched with a threaded hole and then is located on one side, far from the valve body, of the threaded hole, a comparison block is arranged on the side wall of the mounting block, and scales are formed in the comparison block; and B, the threaded rod is rotated to drive the valve core to move, and the number of turns of rotating the threaded rod is controlled according to the scales formed above the threaded rod, so as to control the distance of the threaded rod moving along the axis. Compared with a traditional mode of moving the valve core by using a handle, the method avoids the situations that a valve port of the valve core i