Abstract: It can provide an empirical basis for the economic integration of the urban agglomeration in Yunnan Province by
quantitative measurement of the industrial association of the urban agglomeration in Yunnan and the cities within the urban
agglomeration. For the urban agglomeration in the Central Yunnan, the cost changes of agriculture, mining and electricity fuel water
industry have greater impact on other industries, while the pulling effect of wholesale and retail trade, finance and technology industries
is relatively large; the manufacturing industry did not play a role in economic growth and integration in the development of urban
agglomeration in the Central Yunnan; industrial connection degree of Kunming city and the other three cities is high, while the degree
of industrial connection between Yuxi and Qujing is the weakest.

Key words: urban agglomeration in Central Yunnan, input and output, method of average propagation length