Abstract: In order to study the impact of participating in carbon trading on the operation strategy of multi-source cogeneration system combined cooling heating and power, taking an industrial park as the research object, a multi-source cogeneration system including energy storage was constructed. Taking the electrothermal characteristics, climbing power limit of combined heating and power（CHP） and supply-demand balance as constraints and the annual comprehensive cost including operation cost and carbon transaction cost as optimization objectives, the effects of parameters including the proportion of photovoltaic utilization area（x） and the heat distribution coefficient of waste heat boiler input absorption chiller（μ） on the comprehensive cost and carbon emission of the system were studied. Results show that photovoltaic equipment has a greater impact on the system economy than solar boiler. The best economy is obtained when x is 90%. The ranges of μ in four seasons are 0,1, 0.74,1, 0,1, 0,0.21, which should be valued reasonably according to season and demand.