The invention discloses an efficient steam-water separation device for power station auxiliary equipment. The efficient steam-water separation device comprises a tank body and a deaerator, wherein the top end of the tank body is closed, the bottom end of the tank body is open, a funnel is arranged at the bottom end of the tank body, the edge of the top end of the funnel is connected with the edge of the opening in the bottom end of the tank body, the bottom end of the funnel is connected with a drain pipe, an electromagnetic valve is arranged in the drain pipe, a water level sensor is arranged on the inner wall of the funnel, a gas outlet of the deaerator is connected to the side surface of the bottom end of the tank body through a pipeline, a plurality of separation plates are arranged in the tank body, through holes are uniformly distributed in the surfaces of the separation plates, cooling pipes are arranged in the separation plates, water inlets of the cooling pipes are connected with water inlet branch pipes, the water inlet branch pipes penetrate through the side surface of the tank body and are connected with a water inlet pipeline, and the water inlet pipeline is connected with a water outlet of a water pump. The efficient steam-water separation device for the power station auxiliary equipment separates steam and water more rapidly and has a good separation effect and high efficiency.