With the increasing internationalization of China, language communication has become an im- portant channel for us to adapt to the political and economic environment. How to improve English learners' language learning efficiency in limited conditions has turned into a problem demanding prompt solution at pre- sent. This paper applies two pronunciation patterns according to the actual needs of English pronunciation rating: to-be-evaluated pronunciation pattern and standard pronunciation pattern. It will translate the patterns into Eng- lish pronunciation rating results through European distance. Besides, this paper will introduce the design philos- ophy of the whole algorithm in combination with CHMM matching pattern. Each link of the CHMM pattern will be given selective analysis while a contrast experiment between the CHMM matching pattern and the other two patterns will be conducted. From the experiment results, it can be concluded that CHMM pattern is the best op- tion.