As China continues to promote the integrated development of urban and rural areas and financial digital transformation, digital finance, as one of the five chapters of the financial industry to accelerate the formation of new quality productivity, has become an increasingly hot issue to narrow the gap between urban and rural development and help urban-rural integrated development. By combing and analyzing the related research between domestic digital finance and urban-rural gap, this paper comprehensively summarizes the research conclusions of the correlation between digital finance and urban-rural gap, and makes an in-depth analysis of the reasons for the differentiation of the research conclusions. It is clearly pointed out that there are three major problems in this field, such as narrow research surface, single research method and lack of timeliness of research conclusions. And based on the analysis results put forward further breakthrough and improvement direction.