In recent years, the rapid development of the economy has continuously driven the growth of consumer demand in China, leading to a sustained upgrade in consumption structure. The increasing demand from consumers for diversified textiles and clothing has strongly propelled the development of China's textile and garment industry. Meanwhile, the serious issues of energy consumption, environmental pollution, and resource waste in the textile and garment industry are becoming increasingly prominent, making it one of the industries with the highest resource waste and most waste production in China. A sustainable clothing consumption pattern for consumers is not only an objective requirement for China to achieve its "dual carbon" goals but also an effective solution to the environmental problems caused by the textile and garment industry. However, Chinese consumers currently face challenges in implementing sustainable clothing consumption behaviors, such as low likelihood of occurrence and difficulty in implementation. Therefore, conducting in-depth research on the factors influencing sustainable clothing consumption and its mechanisms can ensure more precise guidance for consumers to practice sustainable clothing consumption behaviors and promote the industry's sustainable development. Firstly, the significant differences in the performance of Chinese residents in various types of pro-environmental behaviors were found through the analysis of literature. For example, Chinese residents demonstrate good frugal behaviors in daily life, while showing reluctance or willingness without implementation in sustainable consumption of clothing, leading to an awkward dilemma. Given that frugal behaviors and sustainable clothing consumption behaviors both fall under the category of dynamically changing pro-environmental behaviors, although they are of two different types, they are interrelated and share the same motivation. Thus, it is appropriate to construct a model of behavioral spillover effects. Secondly, based on the behavioral spillover effects and self-perception theory, a theoretical framework model was constructed, including variables such as frugal behaviors, sustainable clothing consumption behaviors, environmental self- identity and social norms. Meanwhile, relevant hypotheses and developed scales were put forward. Subsequently, a questionnaire survey was conducted targeting Chinese consumers. After eliminating invalid questionnaires due to missing answers or insufficient response times, a total of 351 valid samples were obtained. Finally, by using SPSS software and data analysis methods such as reliability and validity analysis, path analysis, mediation tests and moderation tests, the research hypotheses were validated. The results indicate that frugal behaviors among Chinese residents, including aspects related to diet, transportation and usage, positively influence sustainable clothing consumption behaviors. Additionally, environmental self-identity serves as a mediator in the relationship between frugal behaviors and sustainable clothing consumption behaviors. Moreover, social norms play a significant moderating role in the relationships between frugal behaviors and sustainable clothing consumption behaviors, as well as between frugal behaviors and environmental self-identity. This conclusion confirms the promoting effect and influencing mechanism of frugal behaviors on sustainable clothing consumption behaviors. It provides valuable insights for fostering sustainable consumption behaviors among Chinese residents and promoting the sustainable development of the clothing industry. Additionally, this study introduces the behavioral spillover effects into the research of sustainable clothing consumption behaviors, providing a new perspective for the study of sustainable clothing consumption and offering targeted policy suggestions to enhance consumer participation in sustainable clothing consumption behaviors. Certainly, considering the broad range and diverse preferences of Chinese consumers, future research should refine the study's target groups and explore more deeper into the motivating factors for sustainable clothing consumption among different demographics. Moreover, future research also aims to incorporate more influencing factors and explore the spillover mechanisms between other types of pro-environmental behaviors and sustainable clothing consumption behaviors. [ABSTRACT FROM AUTHOR]