The invention relates to a solar cogeneration system based on organic rankine cycle and lithium bromide refrigeration, including a solar heat collection system, an organic rankine cycle power generation system, a lithium bromide absorption refrigerator, terminal heating, and a domestic heat system. The organic Rankine cycle power generation system includes an evaporator A, a steam turbine, a generator, a condenser A and a working medium pump, the evaporator A is respectively connected with a heat accumulator and a reheater, and the evaporator A is respectively connected with a The connection of the working medium pump and the steam turbine constitutes an organic Rankine cycle power generation system using solar heat collection heat source; and it is connected with the lithium bromide absorption refrigerator and the terminal heating and domestic heating system to form an overall cogeneration system of cooling, heating and power. Beneficial effects: the present invention combines organic Rankine cycle and lithium bromide refrigeration by using solar medium and low temperature energy, which not only achieves the purpose of temperature matching, cascade utilization, and heat refrigeration, but also realizes the functions of power supply, winter heating, and summer cooling. Cogeneration of cooling, heating and power.