The paper makes a brief introduction to the inner differences within Chengcheng dialect in Shaanxi and elaborates rather exhaustively on the rhyme intonations of Chengcheng dialect,the main phonological characteristics as well as the continuous variations in intonation between two groups of characters,which initially exhibits the basic appearances of the phonology of Chengcheng dialect.

The paper compares the pronunciation of Xicheng dialect with Guangyun and Putonghua,analyzes the system of its initials,finals and rimes,at the same time,explains the evolutional laws and the exceptions.