The utility model discloses a heat abstractor for high-power electric control cabinet, include the box back cover that is used for depositing box, inlet tube, the outlet pipe of coolant liquid and is used for absorbing the heat, the box back cover pass through inlet tube and outlet pipe and said box is connected mutually, the box back cover includes the box body as coolant liquid circulation canal, the box body inboard is equipped with a plurality of couplings, the coupling is used for connecting the branch pipe that is used as coolant liquid circulation canal and being used for sealing the sealed lid of coupling. The utility model discloses will the box body design of said box back cover has effectively increased coolant liquid and external area of contact for the circulation canal of coolant liquid, the coupling that said box body inboard was equipped with is used for connecting as circulation canal's the branch pipe and the sealed lid of sealed tube joint, facilitates people to require to determine the branch pipe quantity of to be use and the arrangement form of branch pipe according to electrical equipment's heat dissipation.