The aim of this paper is to examine phenomenon theoretical characters of the Korean Grammaticalization. Grammaticalization has been increasingly receiving attention from researcher in Korean linguistics. In fact, Language change is very dynamic. This paper describes the current trend in Grammaticalzation. And I defined the mechanisms and principles and process of Korean grammaticalization. Restructuring can be defined construction of compound-form which has been accepted as a morphological uni-form. I explained the appropriateness of the reanalysis method by showing that the restructured compound connecting endings can be analyzed not only with the disbursement and function of synchronic but also with the reanalysis through diachronic. This paper main purpose is to clarify on phenomenon and characters of the Korean Grammaticalization. However, In this paper, I regret not to make more clear explanation in doing system reanalysis.