In order to compare the environmental performance of fossil-based materials and starch-based materials with different formulations， the life cycle assessment（LCA） method was used to analyze the impact of the two materials on environmental indicators， as well as the carbon emission equivalents during the raw material acquisition stage and product production stage. Through the environmental assessment software， the life cycle assessment models of the two materials are established. The results show that the main environmental impact indicators of starch-based materials such as gas emissions， energy consumption and water consumption are significantly reduced by 27.79%， 27.55% and 21.29% compared to pure fossil-based polypropylene； the carbon emission equivalent has the greatest impact during the raw material acquisition stage， the second is the product production stage. Therefore， choosing starch instead of polypropylene can effectively reduce environmental pollution for peaking carbon dioxide emissions by 2030 and achieving carbon neutrality by 2060.