Based on the study of urban-rural economic integration connotation, this paper constructs evaluation index system of urban-rural economic integration which includes 27 basic indicators of 4 dimensions and uses the method of two-step principal component analysis to measure the urban-rural economic integration level of 11 provinces in the western region of China. The results show that since 21th century, urban-rural economic integration index of western region of China showed a steady upward trend；that there is obvious difference in four dimensions index growth trend, that urban-rural economic integration index of 11 provinces in western China continues growth, but inter-provincial difference is obvious and presented an “olive-shaped” distribution. In national comparison, the urban-rural integration level in western China is lower than that of the east, the middle and the northeast part of China and is lower than the average level of China. From the perspective of changing trend, the promotion speed of the urban-rural economic integration level in western China is slightly higher than that of northeast part of China, is narrowing with the level of the middle and northeast part of China, but continues to enlarge the gap with the east part of China and forms polarization trend. Policy and suggestions are advanced from the perspective of classification policy, urban-rural industrial structure, urban-rural economic development and so on based on above conclusions.