A high-order finite difference Padé scheme also called compact scheme for solving Korteweg-de Vries (KdV) equations, which preserve energy and mass conservations, was developed in this paper.This structure-preserving algorithm has been widely applied in these years for its advantage of maintaining the inherited properties.For spatial discretization, the authors obtained an implicit compact scheme by which spatial derivative terms may be approximated through combining a few knots.By some numerical examples including propagation of single soliton and interaction of two solitons, the scheme is proved to be effective.