The utility model provides a cooling device. According to the technical scheme, the device comprises a heat dissipation chamber, a plurality of air blowers are connected to the side wall of one side of the heat dissipation chamber, the outer side of the side wall is covered with a protective cover, the upper end of a shell of the protective cover is of a grid-shaped structure, dustproof cotton isconnected to the outer surface of the grid-shaped structure in an attached mode, and an air dissipation pipe is connected to the top of the heat dissipation chamber. The heat dissipation of the plastic film can achieve the corresponding technical effect substantially through gas convection; the side wall of the heat dissipation chamber is directly connected with a plurality of air blowers; airflowis directly introduced into the heat dissipation chamber by utilizing the air blower; corresponding hot air is carried out through the air diffusion pipe; the upper end of the shell of the protectivecover is guaranteed to be of a latticed structure, that is, it is guaranteed that air sucked by the air blower is relatively far away from the ground, the dust-proof cotton can well filter impuritiesin the sucked air, and due to suction force of the air blower to the dust-proof cotton, the stability of the dust-proof cotton in the using process can also be guaranteed.