Based on the non-equilibrium Green’s method and density functional theory,the magnetic transport of Fephthalocyanine dimers with two armchair single-walled carbon nanotube electrodes is investigated.The results show that the system can present high-performance spin filtering,magnetoresistance,and low-bias spin negative differential resistance effects by tuning the extal magnetic field.These results show that the Fe-phthalocyanine dimer has the potential to design future molecular spintronic devices.