《QuanSongCi》 contains 266 rhymes of Liu-yi Ci. Some of them are YaCi`s, and some of them are SuCi`s. We are focusing on SuCi. Liu-yi follows SuCi in his contents and forms. It is quite exceptional that Liu-yi as a highly ranked politician as well as literate his time, followed SuCi. The purpose of this article is to find out what Liu-yi tired out of SuCi`s vulgarism, and the what I found out is as follow. First, Liu-yi Ci`s vulgarism means author`s reflecting mentality. Second, Liu-yi Ci`s vulgarism means proximity to people. Third, Liu-yi Ci`s vulgarism means vitality. Therefore, Liu-yi put to use form of literature Ci exclusive of ShiWen as a tool to express author`s truth, at that time, contrast to his known image as high official writer, his planned to speak out vulgarism. Finally, thru Liu-yi Ci`s vulgarism, culture and vulgarism coexistence which is major characteristic of Ci`s can be identified, we can study his overall Ci literature. Above all, attempts made in this article can support deep understandings on historic backgrounds as well as writers` characteristics and their psychologics.