The invention relates to the technical field of grinding equipment, and particularly discloses a turbine shell end surface grinding device. The device comprises a grinding unit, a dust suction unit and an abutting unit; the grinding unit comprises a horizontal shaft, the end part of the horizontal shaft is connected with a grinding disc, and the grinding disc is provided with a groove; the dust suction unit comprises an air cylinder and a cam, the cam is fixed on the horizontal shaft, a piston rod of the air cylinder abuts against the periphery of the cam, a spring is fixedly arranged below anair cylinder piston, an air outlet one-way valve and a first air inlet one-way valve are arranged on the side wall of the air cylinder, a through hole is formed in the horizontal shaft, a dust suction hole is formed in a grinding wheel, the horizontal shaft is connected with a dust suction pipe, the dust suction pipe communicates with the first air inlet one-way valve, a branch pipe communicatingwith the dust suction pipe is further arranged, and the branch pipe is inserted into a mounting hole of a turbine shell; and the abutting unit comprises an inflator, a positioning block is slidably connected in the inflator, the air outlet one-way valve is connected with an exhaust pipe, and the exhaust pipe communicates with the inflator. By adopting the technical scheme, scrap iron can be cleared at the same time in the grinding process, so that manual cleaning is not needed.