| This paper investigates the usage of 118 dialects vocabulary in two areas of Yuecheng town (urban) and Furong town (rural) in Yueqing, and explores the influence of Putonghua vocabulary on the usage of present Yueqing dialect. The full text is divided into seven chapters. The first chapter is the introduction, and it briefly introduces the reasons of research this subject, as well as the research contents, scopes,objects, methods and steps. The second chapter briefly describes overseas and domestic research status. The third chapter introduces the overall situation of Yueqing,the characteristics of Yueqing dialect and the dialect contact situation. The fourth chapter describes and analyzes the present usage situation of Yueqing dialect on the basis of field investigation. Furthermore, it discusses the connections among lexical substitution, pronunciation and grammar. Chapter 5 analyzes the relationship among the four factors which concludes age, gender, region and occupation and the degree of lexical substitution individually. Chapter 6 relates the internal and external factors of the language to discuss the causes of language changes. Chapter 7 discusses the replacement characteristics and development trend of Yueqing dialect vocabulary. The conclusion part mainly summarizes the present situation of Yueqing dialect lexical substitution, and puts forward the problems that worth attention in later research.Through the above analysis, it is found that the replacement rate of nouns is the fastest in all words, and the second is quantifiers. Verbs and adjectives are slower, and adverbs, functional words and pronouns are not replaced. In addition, age is the most important factor in the lexical substitution process. The difference between old people’ s language and young people’ s language is obvious. In short, through this survey, we found that Putonghua vocabulary already has replaced a part of the dialect vocabulary, and the degree of vocabulary replacement influenced by a number of factors. |