NSW's long-serving Christian Democrat MP Fred Nile is facing a revolt within his party after moves from some members to overthrow him and the party's board.

Christian Democratic Party officials are seeking urgent legal advice following a push to remove the board and Mr Nile, amid accusations of nepotism and mismanagement.

Christian Democrats' Fred Nile. Credit:Jon Reid

The party is fractured after a fiery state council meeting on the weekend, which saw several board members walk out when a no-confidence motion was moved against Mr Nile and the board.

Joshua Grewal, who led the charge and says he is now chair of a newly-created "directional committee", warned that the party needed to renew if it was to have future electoral success.