The evolution of ordered interphase boundary (IPB) of Ni75AlxV25-x alloys was simulated using the microscopic phase-field method. Based on the atomic occupation probability figure on 2D and order parameters, it was found that the IPB formed by different directions of θ phase has great effect on the precipitation of γ phase. The γ phase precipitated at the IPB that is formed by[100]θ direction where the (001)θ plane is opposite, and then grows up and the shape is strap at final. The IPB structure between γphase and θ phase is the same. There is no γ phase precipitate at the IPB where the (002)θ and (001)θ planes are opposite,the ordered IPB is dissolved into disordered area. There is γ phase precipitation at the IPB formed by the [001]θ and [100]θ directions, and the IPB structure is different between γ phase and the different directions of θ phase. The IPB where (001)γ and(100)θ plane opposite does not migrate during the γ phase growth, and γ phase grows along [100]θ direction.