Green development is the background of common prosperity and is important for the sustainable development of China. The purpose of this paper is to quantitatively evaluate China’s common prosperity policies to understand the advantages and disadvantages of common prosperity policies. In this paper, 15 representative common prosperity policies are research subjects, and this study uses the PMC (Policy Modeling Consistency) index method to assess the quality of common prosperity policies in China. This study, firstly, finds that the average value of the 15 common prosperity policies is 6.47, evaluated as a good grade. Secondly, 80% of policies are evaluated as a good or excellent grade, which means that the quality of the policy making of 80% of policies is at least good. Except for policy prescription, policy subject and policy incentive, the values of other first-level indicators are all greater than six, indicating that the Chinese government’s formulation level of common prosperity policies is relatively high. Thirdly, among fifteen common prosperity policies, one policy is evaluated as a perfect grade (quality of policy making is very good), four policies are evaluated as excellent (quality of policy making is better than required), eight policies are evaluated as good (quality of policy making is good) and two policies are evaluated as bad (quality of policy making is bad). Fourthly, by drawing figures composed of PMC curves, this paper analyzes common prosperity policies of different grades. Finally, some suggestions are proposed in this study to improve China’s common prosperity policies.