High-low pressure intercepting slide valve

The invention relates to a high-low pressure intercepting slide valve, and belongs to the technical field of intercepting slide valves, the high-low pressure intercepting slide valve comprises a shell, one end of the shell is communicated with a first oil port, the other end of the shell is communicated with a fourth oil port, the shell comprises a shell body, the left end of the shell body is provided with a left end cover, and the right end of the shell body is provided with a right end cover; a second oil port and a third oil port which are communicated with the interior of the shell body are formed in the side wall of the shell body, a sliding hole is formed in the shell body, a valve element connected with the sliding hole in a sliding mode is arranged in the sliding hole, a check ring is arranged on the side wall of the sliding hole, the check ring is arranged between the valve element and the right end cover, and a spring is further arranged in the sliding hole. The spring is arranged between the valve