Heat dissipation device and fixing assembly thereof

The invention relates to a heat dissipation device and a fixing assembly thereof, and the heat dissipation device is provided with a heat dissipation assembly and a fixing assembly. The heat dissipation assembly is provided with a metal plate and a water pump. The metal plate has a heat absorbing surface and at least one through hole. The heat absorbing surface is used for being attached to a heat source. The water pump is fixedly arranged on the metal plate. The fixing assembly provided by the invention is provided with a bracket and at least one fixing piece. The bracket is provided with at least one through groove, and the through groove penetrates through the bracket and comprises a plurality of hole parts. The plurality of hole parts are communicated with each other, and one of the hole parts is aligned with the through hole of the metal plate. The fixing piece is arranged in the hole part of the through groove and the through hole of the metal plate in a penetrating mode. By means of the structure, the