in this article, within the framework of the density functional theory, primary calculations were performed to predict the crystal structures and relative energy stability of compounds in the Ni-P binary system in the pressure range of 300-400 GPa. As a result, seven new crystal structures were predicted, six of which are represented as a three-layer dense package of Ni atoms, in which some of the atoms are replaced by phosphorus atoms. A new highpressure phase characterized by the Cmca spatial group was found for Ni3P nickel phosphide. For Ni2P, a phase with an antikotunite structure that is stable in the considered pressure range is predicted.