The Marxist theory of urban-rural relationship reveals the general trend of urban-rural relationship from separation to integration. The report to the 19th CPC National Congress calls for establishing and improving systems，mechanisms and policies for integrated urban and rural development. The above theories and documents provide theoretical support and point out the direction for the integrated development of urban and rural areas in Northeast China. Based on the concept of urban-rural integrated development，this paper constructs an evaluation index system，including 6 first-level indicators such as rationalization of factor allocation，integration of industrial development，equalization of public services，integration of infrastructure，greening of ecological environment，and sharing of residents’ life，as well as 24 specific indicators. Based on the evaluation model，it can be concluded that during the period of 2008-2018，the overall level of urban-rural integrated development in Northeast China has risen and its ranking has remained stable，but the gap with the eastern region has widened and the advantages with the western region have narrowed. Among them，the urban-rural integrated development of Liaoning takes the first place in Northeast China，and Jilin and Heilongjiang alternately rise in rank，respectively showing a widening gap with their partner provinces. Green ecological environment and industrial integration have become two “highlights” of urban-rural integration development. The results of this study provide decision-making advice and intellectual support for governments at all levels to accelerate the integrated development of urban and rural areas under the normal situation of epidemic prevention and control in the New World.