The invention provides a thermal power system with complementation between solar energy and biomass energy. The thermal power system comprises a solar light condensing device, a solar heat storage kettle, a biomass heat power station, a combined refrigerating and icing device for intensive cooling, and a hot water system for intensive heating, wherein the solar light condensing device is connected with the solar heat storage kettle through a pipeline, the inlet of a first output heat exchanger B1 of the solar heat storage kettle is connected with the outlet of a water supply pump of a biomass boiler, and the outlet of the B1 is connected with the inlet of a water supply system of the biomass boiler; an inlet pipeline of a second output heat exchanger B2 of the solar heat storage kettle is connected with an output pipeline of a water purification plant, and the outlet of the B2 is connected with a heat input pipeline of the combined refrigerating and icing device; the heat input pipeline can supply heat for refrigerating and icing; and work cooling water of the combined refrigerating and icing device is connected to a hot water kettle of the heat supply system to intensively supply heat to users. The solar heat storage kettle is a two-medium or three-medium double-circulation heat storage kettle, and the heat storage medium is heat transfer oil and fused salt.