Based on the isospin-dependent quantum molecular dynamics model,the effects of different neutron-proton effective mass splitting,on the nuclear stopping and neutron-proton emission numbers were studied respectively in the reaction systems of ¹¹²Sn+¹¹²Sn,¹²⁴Sn+¹²⁴Sn and ¹³²Sn+¹³²Sn with different system energy (50,100 and 200 MeV/u).The results show that the neutron-proton effective mass splitting has obvious influence on the nuclear stopping and neutron-proton emission numbers.When the neutron-proton effective mass splitting is increasing,the nuclear stopping and neutron-proton emission numbers are decreasing.The value of neutron-proton effective mass splitting can be confirmed by the nuclear stopping and neutron-proton emission numbers in experiments.