Abstract: Promoting narrowing the urban-rural income gap, is an important part of achieving high-quality development. In the context of the regional integration of the Yangtze River Delta as a national strategy, this article uses the coefficient of variation, Markov chain and spatial analysis to explore the spatial-temporal evolution characteristics of urban and rural income as well as urban-rural income gap between 2000-2018 in the Yangtze River Delta. As well, based on the spatial econometric models, this article explores the driving factors of urban-rural income gap. The results showed that: （1)The coefficient of variation of urban and rural income in the Yangtze River Delta all show a trend of rising first and then declining, urban income is higher than rural but the coefficient of variation of rural income is higher than urban income. The “core-edge” pattern of urban and rural income in space are strong stability. In particular, high-income clubs have a strong steady state. （2)On the whole, the urban-rural income gap also presents a significant “core-edge” pattern. From the perspective of the evolution of urban-rural income gap, the narrowing of the high-value area and the expansion of the low-value area, indicate that the overall income gap of urban-rural income gap in the Yangtze River Delta has narrowed. The difference evolution in different cities indicates that, the policy of narrowing the urban-rural income gap should be tailored to local conditions. (3）For the driving factors, economic development, population mobility, government influence and opening up are important factors of urban-rural income gap. However, the differences of driving factors in different periods indicate that, the formulation of relevant policies in the future should be random and dynamic. In the process of integration and deepening, the significant increase in spatial spillover effects also indicates that, the formulation of relevant policies should strengthen the interaction among cities. The research in this paper not only enriches the theoretical research on the urban-rural income gap, but also provides an experience to formulate relevant policies to promote coordinated development of urban and rural areas for the Yangtze River Delta and other urban agglomerations.