Abstract: With the aid of theories of developing economics,city economics and ecology,this article analysis the present situation and the trend of development in low-developed area in the middle city by taking Xinyang city as an example.The concept "the cities ecology" was proposed.The low of social economy develepment,the ecology is the direction and the urbanization is measurement,was revealed.Their relatins and function mechanism in the developing process were elaborated.This thought has important theorical and pr...