The invention discloses a photovoltaic cooling-heating electric co-production system modeling method. According to the technical scheme, a photovoltaic cooling-heating electric mathematic model is constructed, and the photovoltaic cooling-heating electric mathematic model is simulated through MATLAB/Simulink. An electric co-production system model is constructed and subjected to digital simulation, in the simulation process, the temperature-rise problem of a photovoltaic component brought in an electricity generation process is considered, cooling modeling is conducted on a solar battery during simulation, the energy in a solar cell panel is collected and utilized, the simulation of the energy utilized rate is achieved, so that the simulation has high reliability, the purpose that the temperature of the photovoltaic component is effectively lowered can be achieved, the temperature range fit for work is controlled, the waste heat of the photovoltaic component is effectively utilized, the recycle of the energy is achieved, the occurrence of energy waste is reduced, the simulation effect is good, the simulation cost is low, the solar photovoltaic efficiency and photothermal efficiency when perturbation occurs in the illumination intensity are observed in real time, and the simulation safety is sharply improved.