The invention relates to an automatic hydraulic deviation correction device for coal seam hydraulic drilling, belonging to the technical field of drilling devices. The device of the present invention first fixes the drill pipe in the positioning sleeve through the drill pipe buckle, then turns on the power, opens the console, starts the motor to transmit power to the drill pipe joint to drive the drill pipe, and calculates the offset situation through the information transmitted by the pressure sensor , and control the air pressure in the air cushion to adjust the direction of the drill pipe, and at the same time control the hydraulic machine to make the water flow in the water storage tank inject the jet port from the jet channel, and form a high-speed jet flow in the opposite direction of the drill bit deflection, and perform directional and local damage to the rock, so that the The rock becomes relatively "softer", and the borehole will be drilled in this direction, that is, drilled in the opposite direction of the borehole's deviation, correcting the direction of deviation.