Taking the edges of Zhao yang District, Weining County, Ludian County as a case study, economy development gap among edges of Zhao yang District, Weining County and Ludian Count was evaluated in this paper based on several indicators such as per capita GDP, per capita net income of farmers and overall economic development gap, and GIS spatial analysis technology, variance coefficient and range. The results showed that the gap general economic development gap varied in different in edges of Zhao yang District, Weining County and Ludian County. Finally, related countermeasures and proposals were put forward.