The invention discloses a power cooling device for an electric automobile. The power cooling device comprises a shell, a cooling fan and a controller. Gas inlet pipes are arranged on the outer surface of the shell, and the left end and the right end of the shell are connected with cooling fins. The cooling fan is installed inside the shell. The controller is arranged on the outer surface of the shell. The gas inlet pipes are connected with corresponding pipelines. The rear end of the shell is connected with a cooling chamber. The upper left end of the cooling chamber is connected with a water inlet. Heat conduction pipes and cooling pipelines are arranged inside the cooling chamber. The cooling pipelines communicate with the inside of the water inlet and the inside of a water outlet. A thermal-protective coating is arranged on the inner wall of each gas inlet pipe. The outer surface of each gas inlet pipe is coated with a protecting bush. A power line is connected with the cooling fan. According to the power cooling device for the electric automobile, hot gas around a motor can be absorbed through the gas inlet pipes and be further conveyed into the cooling chamber for cooling discharge, the hot gas on the periphery can be cooled and the cooling speed of the motor can be increased.