Abstract: The consumption ratio of urban residents and rural residents in Chengdu is used as a measuring index of the urban-rural income gap.The per capita GDP of the tertiary industry in Chengdu is used as a measuring index of the economic growth.Through the establishment of the VAR model,co-integration analysis and Granger causal inspection,the relationship between urban-rural income gap and economic growth of Chengdu is shown and analyzed from the perspective of the consumption level.The results show that the effect of the development of tertiary industry on the urban-rural income gap is very significant in Chengdu.Through adjusting the development strategy and growth mode,strictly controlling inflation and promoting the modern agriculture construction，the urban-rural income gap will be narrowed and the economic growth will be harmonious.

Key words: urban-rural income gap;economic growth;VAR model, co-integration analysis;Granger causal inspection