Computer fan high in heat dissipation speed

The invention discloses a computer fan high in heat dissipation speed. The computer fan comprises a fixing bottom plate, an annular frame, a fan blade support and fan blades. Fixing holes are formed in the periphery of the fixing bottom plate, and the middle of the fixing bottom plate is hollow. The annular frame is fixed to one side of the fixing bottom plate, and the hollow part of the fixing bottom plate is surrounded in the annular frame. The annular frame is made of metal materials, a plurality of cooling fins are arranged on the periphery of the outer side of the annular frame, and the cooling fins are arranged on the outer side of the annular frame at equal intervals in an array manner. The fan blade support is arranged at the hollow position of the middle of the fixing bottom plate. The fan blades are arranged in the annular frame and driven by a motor fixed to the fan blade support to rotate. The annular frame is made of the metal materials, heat conduction and heat dissipation performance of the met