Abstract: The lately researches of the function ofFLC in the process of vernalization are reviewed in this article on the basis of summarizing various pathways those promote flowering. The research in Arabidopsis shows thatFLC may play a key role in the response to vernalization. It also plays an important role in the autonomous pathway. The level of FLC determines the extent of the vernalization response in the promotion of flowering and there is a quantitative relationship between the duration of cold treatment and the extent of down_regulation of FLC activity. Longer cold treatment can reduce the level of FLC. Also demethylation can downregulate the expression of FLC. The series researches showed that vernaliza tion may unlock the biosynthesis of GA by demethylating relational genes and promote flowering.