Top sheltering device used for truck

The invention relates to a sheltering device, in particular to a top sheltering device used for a truck. The top sheltering device used for the truck aims at achieving the technical purposes that theinside of a compartment cannot be too damp, and domestic animals are unlikely to be ill. According to the technical scheme, the top sheltering device used for the truck comprises a first vertical board, a second vertical board, a rotary shaft, a small concentric-square-shaped frame, a stop block, a first motor, an equilateral cam, a large concentric-square-shaped frame and the like; and the frontside of the top of the truck compartment is connected with the first vertical board, the rotary shaft and the first motor are installed on the left portion of the rear side of the first vertical board, the first motor is located on the right side of the rotary shaft, and the small concentric-square-shaped frame is arranged on the rotary shaft in a sliding mode. The top of the truck compartment canbe sheltered through shelt