Electric grinding machine tool and grinding disc shade thereof

The utility model relates to an electric grinding machine tool and a grinding disc shade thereof. The electric grinding machine tool comprises a holding body, an electric motor, a grinding disc and an air flow generating piece, the air flow generating piece enables heat dissipation air flow to be formed in the holding body when the electric motor rotates, the grinding disc shade is connected with the holding body in an assembled mode, the air flow generating piece is covered in the grinding disc shade, and the grinding disc shade comprises a shade body, a set of connectors and a release opening facing the grinding disc. The mask body is not provided with a group of connectors and an air vent except for the release port, the release port is seen from the direction from the group of connectors to the release port, and the inner wall of the release port is provided with a drainage section, an air outlet section with the slope different from that of the drainage section and an arc-shaped steering section connecte