Pressure reducing valve

The pressure reducing valve comprises a valve cover and a valve body, the valve cover is arranged on the valve body, a mounting hole is formed in the top of the valve cover, a screw is in threaded connection with the interior of the mounting hole, the outer side of the screw is in threaded connection with a nut, a valve element seat is arranged at the bottom of the valve body, and a containing cavity is formed among the valve cover, the valve body and the valve element seat. A pressure regulating pad, a spring, a base plate, a diaphragm and a valve element are sequentially arranged in the containing cavity from top to bottom, and the two sides of the diaphragm are fixed between the valve deck and the valve body. A water inlet is formed in the left side of the valve body, a water outlet is formed in the right side of the valve body, the valve element penetrates through the whole valve body, the bottom of the valve element is embedded in a shaft seat, the shaft seat is embedded in a valve element seat, a valve