The utility model discloses a grinding wheel cleaning machine for removing marine fouling in nuclear power water intake tunnels. The machine comprises a frame, an engine, a propeller blade, a spherical wheel, an electric grinding wheel and a retractable hydraulic foot. The frame is a cylindrical frame structure, on which an electric grinding wheel spherical wheel is arranged; the engine, the electric grinding wheel and the retractable hydraulic foot are connected to a controller arranged outside. The retractable hydraulic foot is opened to fix the cleaning machine in the tunnel, and the electric grinding wheel is started to remove the shellfish and other marine organisms attached to the inner wall of the tunnel. Compared with the prior art, the utility model has the advantages of no dead angle directional cleaning of the attached marine organisms according to the actual situation of the tunnel, accurate positioning, targeted cleaning, no damage to the reinforced concrete of the inner wall of the tunnel, simple structure, convenient use, high cleaning efficiency, low manufacturing cost, greatly improving the work efficiency, and having a certain application prospect.