A sanding tool, comprising: a baseplate assembly comprising a baseplate for mounting a sanding member; a housing assembly disposed on the baseplate and comprising a body housing; a drive mechanism disposed in the body housing, wherein the drive mechanism drives the baseplate assembly to move; a fan assembly mounted to the drive mechanism; and a support bracket disposed between the body housing and the baseplate; wherein the housing assembly further comprises a functional housing, a hollow cavity is formed in the functional housing, the functional housing is provided with an inlet and an outlet that communicate with the hollow cavity, the inlet communicates with a dust removal channel of the sanding tool, the outlet is configured to discharge gas in the hollow cavity, and the fan assembly is used for forming a dust removal air path moving towards the inlet, the functional housing is disposed on a side of the body housing and a projection of the functional housing on a plane where the baseplate is located is located within the baseplate; and a ratio of an area of a projection of the functional housing on the baseplate to an area of the baseplate is greater than or equal to 0.15 and less than or equal to 0.95, characterized in that the support bracket comprises a support seat, a central release member and a floating connecting arm, wherein the support seat is disposed between the body housing and the baseplate, the central release member is fixedly connected to the baseplate directly or indirectly, the floating connecting arm is connected between the central release member and the support seat, and the floating connecting arm allows the support seat and the central release member to move relative to each other when the support bracket receives an axial and/or radial force. a baseplate assembly comprising a baseplate for mounting a sanding member; a housing assembly disposed on the baseplate and comprising a body housing; a drive mechanism disposed in the body housing, wherein the drive mechanism drives the baseplate assembly to move; a fan assembly mounted to the drive mechanism; and a support bracket disposed between the body housing and the baseplate; wherein the housing assembly further comprises a functional housing, a hollow cavity is formed in the functional housing, the functional housing is provided with an inlet and an outlet that communicate with the hollow cavity, the inlet communicates with a dust removal channel of the sanding tool, the outlet is configured to discharge gas in the hollow cavity, and the fan assembly is used for forming a dust removal air path moving towards the inlet, the functional housing is disposed on a side of the body housing and a projection of the functional housing on a plane where the baseplate is located is located within the baseplate; and a ratio of an area of a projection of the functional housing on the baseplate to an area of the baseplate is greater than or equal to 0.15 and less than or equal to 0.95, characterized in that the support bracket comprises a support seat, a central release member and a floating connecting arm, wherein the support seat is disposed between the body housing and the baseplate, the central release member is fixedly connected to the baseplate directly or indirectly, the floating connecting arm is connected between the central release member and the support seat, and the floating connecting arm allows the support seat and the central release member to move relative to each other when the support bracket receives an axial and/or radial force.