The effects of the Cr substitutional behavior in the different third and fourth nearest interactive potential is studied by the phase field method in Ni75Al15Cr10 at temperature 873 K. The results show: the evolution of the Cr long range order parameter demonstrates the existence of Cr’s substitution for both Ni and Al sites in L12 type ordered structure, and whose solubility in γ′ phase is opposite between the third and fourth shell potential. Besides that, with the increase of the Ni-Al, Ni-Cr third nearest pairwise potential, the occupation of Cr at α sublattice sites enhance while β site’s occupation falls down, but for the Ni-Al, Ni-Cr third nearest pairwise potential, this tendency reverse. As the Al-Cr third pairwise potential increase, the Cr occupation at α and β sites increase. Otherwise the increase of the Al-Cr fourth nearest pairwise potential promotes Cr’s substitution for the Ni sites and decrease Cr’s substitution for Al sites.