There are two kinds of closing method for a given braid ${eta}{in}B_{2n}$, a braid closure $hat{eta}$ and a plat closure $ar{eta}$. In the article, we find a relation between the Conway potential function ${ abla}_{hat{eta}}$ of braid closure $hat{eta}$ and ${ abla}_{hat{eta}}$ of plat closure $ar{eta}$.