An evaluation system for urban-rural integration indexes was constructed to promote the integrated development of urban and rural areas in Jiangsu Province and other regions. The natural discontinuity method， nuclear density estimation method and exploratory spatial analysis method were combined to describe the spatiotemporal distribution and evolution of urban-rural integration in counties in Jiangsu Province from 2013 to 2021. The internal obstacles and external driving factors of urban-rural integration in counties in Jiangsu Province were identified based on obstacle degree model and geographic detector model. The results showed that the level of urban-rural integration in counties in Jiangsu Province had continued to rise since 2013， but there were differences in the level of urban-rural integration between counties and the differences were still expanding. The integration level of each dimension by 2021 from high to low was as follows： social integration， ecological integration， spatial integration， economic integration， and population integration. The integration level of each region from high to low was as follows： southern Jiangsu region， central Jiangsu region， and northern Jiangsu region. There was a global spatial positive correlation between urban and rural integration in counties in Jiangsu Province， and the local spatial distribution pattern was characterized by high-high agglomeration type and low-low agglomeration type， with low-level agglomeration accounting for the main part. Overall， the low level of industrial structure and employment structure， the deviation between industrial structure and employment structure， were the main internal obstacles to the integrated development of urban and rural areas in counties in Jiangsu Province. There were differences in the resistance levels of various obstacles in the southern， central， and northern regions of Jiangsu from a regional perspective. Digital technology was an important external driving force for the integration of urban and rural areas in counties in Jiangsu Province. Among them， the digitalization of rural economy had the most obvious driving effect on the integration of urban and rural areas， and digital marketing was the main driving path. It is believed that efforts should be made to strengthen communication and interaction between counties， and promote coordinated and balanced development among them； optimize the industrial structure and employment structure of counties simultaneously， adapt to local conditions， target the advantages and disadvantages of each county， and break down obstacles to the integrated development of urban and rural areas in counties in Jiangsu Province. Focus should be put on supporting the application of digital technology in the rural economy， cultivating new business models represented by rural e-commerce， and helping the integrated development of urban and rural areas in counties to reach a new level.