It is spoken mainly in northern and eastern Sichuan, the northeastern part of the Chengdu Plain, several cities or counties in southwestern Sichuan (Panzhihua, Dechang, Yanyuan, Huili and Ningnan), southern Shaanxi and western Hubei.

Chengdu-Chongqing Dialect is spoken within central Chongqing, Chengdu and surrounding provinces.

On the other hand, three Beijing finals do not exist in Sichuanese: [ɤ], [iŋ], and [əŋ].

About one third of Sichuan dialects have a special entering tone, with a relatively independent set of finals, e.g.: [iæ], [uæ], [ʊ], [ɘ], [ɐ], [iɐ], [uɐ], [ɔ], [yʊ], [yɵ], etc.

[12] Note: the table is only based on 《成都语音的初步研究》in 1958, the changes of Chengdu dialect in recent years are not considered: As a branch of Sichuanese, Chengdu-Chongqing dialect is mainly composed of three parts: ancient Ba-Shu Chinese, vocabulary brought by immigrants in Ming and Qing Dynasties, and lingua franca of ancient China.

[13] Recently, many loanwords have been introduced to Chengdu and Chongqing from standard Mandarin and English.

Meanwhile, new words are developing Chengdu and Chongqing, which then spread at a dramatic speed through China.

[14][15] For example, “雄起”(xióng qǐ) (meaning to "cheer up"), is a typical Chengdu-Chongqing word that gets popular in China, equivalent to "加油" (jiāyóu) in standard Mandarin.