Abstract: Based on the related literature, this article puts forward a hypothesis that the scientific level of planning-making has an effect on implementation performance. From the perspective of the government, taking Chongqing's 12th five-year plan as an example, through the questionnaire among the municipal government departments and data collection, this article set up a multiple linear regression model. The research shows that: the feasibility and operability of planning have a very obvious positive effect on the implementation performance; the objectivity of planning has a significant positive effect on the implementation performance; the positive influence of the clarity of planning on the implementation performance is not significant. Based on the research results, the corresponding policy recommendations are proposed.