Computer host heat dissipation device

The utility model discloses a heat dissipation device for a computer host, belongs to the technical field of computer hosts, and aims to solve the problems that the internal use space of the host is occupied by additionally arranging a heat dissipation fan, the heat dissipation mode is single, the heat dissipation rate is low, and the heat dissipation effect is poor. Through the arrangement of the first heat dissipation device and the second heat dissipation device, part of heat in the host can be extracted from the bottom and the side plate of the host shell, so that the use space in the host shell is increased, and dust is prevented from entering the host shell; through the arrangement of the cavity, the water conveying pipe, the cooling liquid, the heat conduction oil and the refrigerating device, the heat conduction oil in the cavity and the cooling liquid in the water conveying pipe can be used for continuously absorbing heat in the main machine shell, water-cooling heat dissipation is achieved, the heat