Industry is an important support for promoting the high-quality development of the Yangtze River Economic Belt. Based on the data from the China Economic Census Yearbook，related statistical yearbooks and statistical bulletins，we use location quotient to analyze the development and agglomeration levels of manufacturing，service，cultural and related industries，construction，and agriculture in 11 provinces along the Yangtze River Economic Belt. The development level of various industries in the Yangtze River Economic Belt accounts for a relatively high proportion of the country according the result. There is a big gap in the development of different industries in different provinces. The development level of the lower reaches of the Yangtze River Economic Belt is relatively high，and the development level of different industries in the middle and upper reaches of the Yangtze River is quite different. The location quotient method is used to analyze the economic development level，industrial and service industry agglomeration level of important central cities along the Yangtze River Economic Belt，showing that the industrial development level of central cities in the Yangtze River Delta region is relatively high，while the industrial development level of western cities such as Guiyang and Kunming is relatively weak.