The utility model discloses an electric power cabinet heat sink for electric power, including bottom plate, radiator, cooling sap cavity and backplate, the supporting legs is installed to the bottom of bottom plate, and the top of bottom plate installs the electric power cabinet, install the heat dissipation window on the lateral wall of electric power cabinet one side, install the radiator on thelateral wall of the window top electric power cabinet that just dispels the heat, the output of radiator is installed and is extended to the inside ventilating board of electric power cabinet, the circulating pipe is installed to the input of water pump, and the input of circulating pipe extend to the cooling sap cavity the bottom, the backplate is installed through the construction bolt in the back of electric power cabinet. The utility model discloses a radiating mode of combination formula for the heat dispersion of electric power cabinet is more outstanding, and can higher season and thearea of adaptation temperature, has improved the application scope of electric power cabinet, the radiator of setting can be under the general condition of temperature to the cooling of dispelling theheat of the electrical equipment in the electric power cabinet, practiced thrift the resource, convenient to popularize and use.