Angle grinder used for reinforcement and repair and with dust proof function

The utility model provides an angle grinder used for reinforcement and repair and with a dust proof function. The angle grinder is structurally provided with a dust proof cover with sealed side walls, so when the angle grinder carries out reinforcement and repair operation, produced dust can all be blocked by the sealed side walls, and the dust cannot diffuse into air. Meanwhile, the dust proof cover is further provided with a through hole and a dust discharging pipe, the dust blocked by the sealed side walls can be absorbed by a dedusting device connected to an end opening of the dust discharging pipe, and therefore the dust is prevented from polluting the air.