关键词: 主观幸福感, 数字化, 智慧城市, 数字鸿沟

Abstract: This paper uses data from the China Family Panel Studies （CFPS） and the multiperiod DifferenceinDifferences （DID） method to empirically analyze the impact of urban digital transformation on residents subjective wellbeing from the perspectives of digital inequality and spatial unevenness The study finds that the implementation of Smart City policy overall increases residents subjective wellbeing Disadvantaged groups in the digital divide，such as rural residents，those with lower educational levels，and the elderly，are unable to enjoy the benefits of urban digital transformation The welfare improvement effect of Smart City is more pronounced in developed areas than in lessdeveloped areas In addition，analyzing the influencing mechanism reveals that Smart City policy has improved residents subjective wellbeing through three channels：social support，work satisfaction，and residents income 

Key words: ubjective well-being, digital transformation, Smart City, digital divide