Water base proportional valve and control method thereof

The invention relates to a proportional valve for a hydraulic support electrohydraulic control system, in particular to a water base proportional valve and a control method of the water base proportional valve. The water base proportional valve comprises a water base proportional valve structure and a testing control part. The water base proportional valve structure comprises a main valve liquid inlet valve bush, a main valve spring, a main valve base, a main valve liquid return valve element, a main valve liquid inlet valve element, a main valve bush, a main valve liquid return valve sleeve,a pilot valve liquid inlet valve element spring, a pilot valve liquid inlet valve element spring base, a pilot valve liquid inlet ball valve, a pilot valve liquid inlet valve base, a pilot valve liquid return valve element spring, a pilot valve liquid return valve element, a one-way valve, a two-station two-way electromagnetic switch valve, an ejector rod, an L-shaped driving rod, a lead screw andnut mechanism and a direc