The invention belongs to the technical field of self-cooling fans, and particularly relates to a self-cooling fan which comprises a fan body, a mounting box and a rotating spindle, the mounting box is fixedly connected to one side of the fan body, and the fan body comprises a swing shell, a main shell, a sliding groove, an oil inlet, a rotating groove, an air vent, an oil outlet and a heat insulation plate. The rotating main shaft penetrates through the left wall of the fan body, a driving motor is arranged in the mounting box, and the driving motor is fixedly connected with the rotating main shaft; a rotating groove is formed in the fan body, rotating fan blades are arranged in the rotating groove, the rotating main shaft penetrates through the heat insulation plate on the left side and extends to the position between the two heat insulation plates, a speed reduction device and a moving device are arranged in the fan body, the speed reduction device is connected with the rotating main shaft, and the moving device is connected with the speed reduction device. By arranging the speed reducer and the moving device, the swing shell is driven to reciprocate, the working area is increased, and therefore the working efficiency of a user is improved.