Promoting sustainable development in resource-based cities is required to accelerate transformative economic development, which also can promote harmonious development and accelerate progress of industrialization while playing a critical role in China's urbanization. However, the role of regional sustainable development plans within resource-based cities is unclear. This paper selected 87 resource-based cities as the treated group, matching propensity scores of city characteristics on a total of 253 cities in China from 2008 to 2018. The paper used the difference-in-differences method to evaluate the impact of the implementation of the “National Plan for Resource-based City Sustainable Development (2013-2020)”, measuring six years before and five years post-planning implementation. We found: (1) The implementation of the plan has promoted economic, social, and ecological transformation by 19.6%, 55.4% and 74.5% respectively (p < 0.01), but there appeared to be no additional effects on sustainable utilization of resources. (2) Among driving factors, market development affected all forms of transformation the most. (3) The impact of this transformation varied by stages of urban development according to the full life cycle of the resource-based city and its local resources. Specifically, the transformation effect of the growing type city in economic, social, ecological and resource transformation was the strongest among that of all type stages.