A support heat dissipation device for a laptop is characterized in that: a curved surface rolling upwards is arranged in the center of the bottom of a base and is used for supporting the laptop; a side surface of the base is provided with a curved surface adjustment device which can adjust the angle that the curved surface inclines upwards to control the height of the laptop; and the side surface of the base is provided with a wind speed adjustment device and a USB interface zone, and then adjustment can be easily performed by a user according to the condition of the laptop. The support heat dissipation device is simple to operate, is novel and practical, the temperature of the inner part of the laptop can be rapidly decreased, the efficiency of heat dissipation can be greatly improved, and the user can conveniently use the laptop.