Abstract: Solar greenhouse is an important agricultural infrastructure, and the azimuth angle of the greenhouse is one of the bases to judge whether the structural design of the greenhouse is reasonable. Choosing a better greenhouse azimuth angle to have better lighting performance is the significance of this paper. Therefore, three-dimensional visualization technology is selected to simulate and analyze the light value of the solar greenhouse, which provides a more intuitive way and method for better research and analysis of the lighting performance and light change of the solar greenhouse, and provides a certain auxiliary role for optimizing the design of high-yield, high-efficiency and energy-saving solar greenhouse. Through the comparison between the measured data and the simulated data, it shows that Ladybug Tools can simulate the changes of different azimuth angles and the comparison of the sunlight in Hotan solar greenhouse with a high accuracy, the error is less than 5%, which provides a certain theoretical basis and reference for the study of the design of sunlight greenhouse in the light.