An efficient solar flat plate heat absorption system, wherein the system is composed of a primary circulating pipe network, a secondary circulating pipe network and a control system, the primary circulating pipe network is formed by communicating a pipeline in a pressure bearing water tank with a heat exchange tube I in a flat plate heat collector group through a pipeline I and a pipeline III, the secondary circulating pipe network is formed by communicating a pipe network at the bottom of a swimming pool with a heat exchange tube II in the flat plate heat collector group through a pipeline II and a pipeline IV, wherein an electric heater is arranged in the pressure bearing water tank, a first thermometer is arranged at a water outlet of the heat exchange tube I, a second thermometer is arranged at the water outlet of the heat exchange tube II, a third thermometer is arranged in the swimming pool, a fourth thermometer is arranged in the pressure bearing water tank, a primary circulating pump is arranged on the pipeline I, a secondary circulating pump is arranged on the pipeline II, and the electric heater, the first thermometer, the second thermometer, the third thermometer, the fourth thermometer, the primary circulating pump and the secondary circulating pump are connected with the control system.