Abstract: In order to establish the evaluation and optimization method of photovoltaic shading design based on component morphological parameters,taking the Changsha Tongyou technology project as an example,a study on the daylight-thermal balance algorithms of high-rise large-span factory was carried out. The size,inclined angle and array method of the photovoltaic shading components are selected as the variable parameters. Daylight-thermal balance algorithm model is obtained by integrating parameter modeling,environmental performance simulation,and multi-objective optimization algorithm. The application of this model in the case study shows that the comprehensive performance of the model presents a non-linear complex changing with the regulation of the morphological variables of multiple photovoltaic shading components.