Based on research data from the renovation of old residential areas in Chengdu, China, this study provides empirical evidence regarding the causal relationship between urban renewal and the transformation of residents’ pro-environmental behaviors. The research results show a significant enhancement in residents’ engagement in pro-environmental behaviors due to the renovation of old residential areas. Robustness tests based on replacement samples and two-stage difference–difference model also confirm the reliability of the conclusions. The preliminary mechanism test indicates that the mechanism of the impact of renovation of old residential areas on the transformation of residents’ pro-environmental behaviors can be attributed to two main factors. Firstly, improving environmental infrastructure, such as upgrading waste segregation facilities and installing intelligent resource recycling devices, provides residents with better conditions for engaging in pro-environmental behaviors. Secondly, an increase in residents’ environmental awareness has led to more voluntary participation in pro-environmental behaviors. This study proposes that decision makers acknowledge that urban renewal serves as both a means of improving urban infrastructure and as a hands-on environmental education for the entire population. Taking urban renewal as an opportunity to enhance citizens’ awareness of environmental protection will effectively promote the transformation of pro-environmental behaviors and support sustainable social development.