The process of urbanization leads to the urban form of mixed national situation,coupled with ethnic,social,economic and cultural background of each are not identical, restricting the use function of the minority languages, and promote the change. Urbanization leads to the three major characteristics of the language function of minority nationalities,which is the mixed use of native language and Chinese language,the difference between generations and the ability to use the mother tongue. Urban minority language function causes the change of main city inhabited by a plurality of minority population and Han population and the multi factors interaction,of urbanization cause minority language function changes in thinking are:urbanization is a modern development inevitable product,multi factors lead to the development of urbanization in the national language to certainly do not like and must strengthen the study of urban ethnic minority languages.