Magnetic anisotropy plays a critical role in achieving long-range magnetic ordering in two-dimensional materials. Herein, concerning the spin-orbit coupling interaction, the MAE of monolayer Nix/CrBr3 (Ni1/CrBr3, Ni2/CrBr3, and Ni8/CrBr3) are calculated using the equation MAE = Eq -Ez, where Eq and Ez represent the total energy of the system along the magnetic moments in the directions q and [001],