Abstract: By introducing four explanatory variables of environmental knowledge， public propaganda， economic incentives and contextual factors， the structural equation model based on the extended planning behavior theory was constructed. The key factors of Chengdu residents’ willingness to MSW classification were identified. Meanwhile， the effect of public propaganda on residents’ environmental attitudes， perceived behavior barriers， environmental knowledge and willingness to classify were discussed. The results showed that environmental attitudes， perceived behavior obstacles， environmental knowledge and situational factors had significant influence on residents’ behavior willingness of MSW classification. Public propaganda had no direct affect on residents’ willingness of classification， but it could indirectly affect residents’ willingness of waste classification through influencing environmental attitudes， perceived behavior barriers and environmental knowledge. Based on the above conclusions， in order to further facilitate the classification of MSW in Chengdu， the government should strengthen the propaganda for the knowledge and value of waste classification in the early stage of implementing waste classification， and at the same time， complete the supporting facilities for the classification and recycling of MSW.

Key words: willingness of classification, public propaganda, environmental knowledge, environmental attitudes, perceived behavior barriers