Summary: West residents ' income gap in China is obvious， of moderate income gap is beneficial for economic growth and social stability， but beyond a certain limit can cause negative This article in existing of theoretical basis and research of Foundation Shang， first on in recent years East Western area residents per capita income gap status and changes trend for intuitive analysis， then from East Western area in the select has representative of provinces data as sample， application multiple regression model for statistics analysis， select 1995-2008 years of per capita domestic economic production worth， and agricultural output accounted for than， and population by education degree， and Government financial expenditures， and import and export trade lines， related sample data for empirical analysis， last by analysis results came narrow income gap of Key words: per capita income gap per capita disposable income of regression analysis
