The utility model belongs to the technical field of driving machinery, especially, relate to a slurry shield high pressure erodees cutting device, from the back to preceding water tank of establishingties in proper order, high -pressure washer pump, hose, pipeline and shower nozzle in slurry shield, spout the back of head position in slurry shield's blade disc, slurry shield's anterior shield before be provided with ball valve no. 2 on the back wall of baffle, slurry shield's anterior shield after be provided with ball valve no. 1 on the back wall of baffle, ball valve no. 1 and the axis of ball valve no. 2 coincide mutually. The utility model discloses can have the mud cake to cut and wash away the blade disc, solve the problem that present slurry shield blade disc mud cake in mud stone,clay stratum is hard to manage, the blade disc bonds mud cake and dregs jam tool bore easily, just removable detachable structure satisfies the long tunnel construction, guarantees that the slurry shield blade disc normally excavates the function, has reduced slurry shield's use cost and construction risk, has improved slurry shield's tunnelling efficiency and geology adaptability.