The utility model discloses an electrical cabinet applicable to the radiation of a large-power electronic component; a partition board is vertically arranged in the cabinet body; the partition board divides the cabinet body into a part which faces to one side of a front door and the other part which faces to one side of a rear door; and the top end of the electrical cabinet is provided with a radiating port. The radiating port is provided with a radiating fan; and the lower end of a door of one side of the large-power electronic component which gives out heat severely is provided with an air inlet. By adopting the technical proposal, the electrical cabinet applicable to the radiation of a large-power electronic component can put the power electronic component with low temperature resistant condition and low heat on one side of the partition board and the large-power electronic component with severe heat on the other side of the partition board, so that the heat radiated by the large-power electronic component with severe heat is not transmitted to the power electronic component with low temperature resistant condition because of the partition board, the temperature of the power electronic component with low temperature resistant condition and low heat is not affected by the heat given out by the lower-power electronic component with severe heat, the heat can be radiated externally, and the service life of the power electronic component is improved.