A solar radiation allocation method based on the optimal comprehensive benefits of photovoltaic power and agricultural production in photovoltaic greenhouse was proposed to solve the problem that the unreasonable solar radiation allocation between the photovoltaic power and agricultural production in photovoltaic greenhouse， resulting in low overall benefits.First of all， a model for the profit of photovoltaic power， the profit of crop， and the costs of operating and maintaining photovoltaic greenhouses was established. Among them， the modified light response model of crop right angle hyperbola was used as the calculation method for crop yield in photovoltaic greenhouses to closely combine the solar radiation with the yield and income of crop. Secondly， a mathematical model for the overall benefits of photovoltaic greenhouses with the goal of optimizing the comprehensive benefits of photovoltaic greenhouses and the constraints of light intensity in photovoltaic power and light conditions for the growth of crop in greenhouse was established. Finally， the benefits of photovoltaic greenhouses under multiple scenarios based on the actual operating data of a photovoltaic greenhouse in Xinjiang were compared and analyzed. The results showed that the overall benefit of the photovoltaic greenhouse was the highest when the minimum proportion of effective solar radiation value and the solar radiation allocation of crops in a photovoltaic greenhouse was selected. It is indicated that the proportion of solar radiation corresponding to the light saturation point of crop can be used as the maximum overall benefit point for PVG when the cost of renovating and operating and maintaining the photovoltaic greenhouse is considered and the original structure is not changed. It will provide the theoretical support for the design of photovoltaic greenhouse.