As an important part of battery package, glass is directly used in solar power generation module, which has the ability to transfer and control light. The transmittance of glass is an important factor affecting the conversion efficiency of solar cells. However, it is affected by many factors, such as metal content in glass, calender pattern and preparation method of glass surface film, etc. In this paper, we use COMSOL software to carry out simulation experiments. This paper focuses on how to use the simplest coating method to reduce the reflectivity of glass, to increase the conversion rate of light energy of glass and to improve the overall performance of the system, to reduce the cost of industrial design and to meet the requirements of green industry.