Grouting blowout preventer for high-pressure water jacking drilling

The utility model relates to the technical field of high-pressure water-jacking drilling grouting blowout prevention, in particular to a high-pressure water-jacking drilling grouting blowout prevention device which comprises a water inlet, a water outlet is formed in the front end of the water inlet, a rotating handle is arranged on the upper side of the front end of the water inlet, and a pressure gauge body is arranged on the left side of the front end of the water inlet. The front end of the pressure gauge body is provided with a connecting pipe, and the left end of the connecting pipe is provided with a water outlet. And the sliding mechanisms are arranged on the upper side and the lower side of the connecting pipe. The sliding block can stably and rapidly slide in the sliding groove through the sliding mechanism so that the sliding block can drive the movable block to move, the movable block can drive the plug block to open the drainage hole, water flow can be drained from the drainage opening through th