In late Ming and early Qing Dynasty,the immigration wave of people from Hubei and Guangzhou moving to Sichuan brought Hakka people in Fujian,Guangdong and Jiangxi as well as their Hakka dialect to Sichuan.Three hundred years later,Hakka dialect is still widely used in regions inhabited by Hakka people,such as Chengdu,Longchang,Xichang and Yilong.Hakka people living in various parts of Sichuan speak not only Hakka dialect,but also Sichuan dialect.Diglossia,communicating through both languages,prevails in Sichuan Hakka households.An analysis of the questionnaires reveals that the diglossia phenomenon in Sichuan Hakka dialect is influenced by the ways of Sichuan Hakka people living in close proximity,their language attitude and habit,intermarriage mode,etc.However,there are indicators of a trend that the diglossia phenomenon may give way to Sichuan dialect.