Oil field hydraulic control multi-switching circulating valve and opening and closing tools

The invention discloses an oil field hydraulic control multi-switching circulating valve, an opening tool sleeved with an upper casing of the circulating valve in a matched mode and used for opening the circulating valve and a special closing tool. The circulating valve comprises a sliding sleeve. Inner annular retaining shoulders are arranged in the upper portion of the sliding sleeve, and an upper piston cavity, a middle piston cavity and a lower piston cavity are formed among annular retaining shoulders of the upper casing and a lower casing in the sliding sleeve and the inner annular retaining shoulders of the sliding sleeve. The opening tool and the closing tool are located on the conical surface in the upper end of the lower casing, upper liquid inlets of the upper casing are closed through the opening tool via pump fluid, high-pressure liquid is guided into the middle piston cavity through the opening tool, the circulating valve is opened, lower liquid inlets are closed through the closing tool via the pump fluid, the high-pressure liquid is guided into the upper piston cavity, and the circulating valve is closed.