Abstract: Abstract：The new concept of coordinated development requires coordinated development among three industries, and the high-quality development of the Yangtze River Economic Belt is inseparable from the coordinated development of three industries. This paper estimates coordination degree of three industries for nine provinces and two cities in the Yangtze River Economic Belt, and adopts static panel, panel threshold and spatial panel models to estimate the impact of transportation, energy and information, three types of infrastructure construction on coordination degree of the three industries in the Yangtze River Economic Belt. Results state that three types of infrastructure construction all significantly improve coordination degree of three industries in the Yangtze River Economic Belt. The improvement effect of transportation infrastructure in the upper reaches of the Yangtze River is the biggest, and the effect of information and energy infrastructure in the middle and lower reaches is bigger. There is a threshold effect for information and energy infrastructure on the improvement of coordination degree of three industries in the Yangtze River Economic Belt. From the low range to the medium-high range, the improvement effect is progressively increasing. There is a spatial autocorrelation effect on coordination degree among three industries in the provinces and cities of Yangtze River Economic Belt. Under this condition, three types of infrastructure construction still improve the coordination degree of three industries, and the improvement effect of information infrastructure on the coordination development of three industries is the biggest. The Yangtze River Economic Belt needs to expand the total investment of infrastructure construction continuously, and shore up the targeted weak spots of infrastructure construction in different regions, and fulfil the spatial spillover effect of coordination degree of three industries among different regions.