In this paper, a novel solar aided power generation (SAPG) hybrid system based on the structural characteristics of coal-fired power generation is established. In this system, the extraction steam of No.8 low pressure heater is replaced by the hot water coming from a concentration-photovoltaic/thermal (C-PV/T) module. The extraction steam returns into the steam turbine to do work, which increases the output power. And the electricity from the parallel C-PV/T module goes directly into the power grid, which increases the generated power. The C-PV/T module coupled with coal-fired power generation improves the solar energy efficiency and provides hot water. As a case study, the economic calculation is performed with actual operation data extracted from a 600-MW coal-fired unit. The results show that the total efficiency increased by 1.3%, the coal fuel consumption is lowered by 11 g/kW.h, and the investment recovery period is approximately 7 years. This study offers a theoretical support to the engineering demonstration.