Working with fast pulse current, low loss NbTi superconducting wires are required to reduce energy losses in High Intensity Heavy-Ion Accelerator Facility (HIAF) magnets. The new type of NbTi superconducting wires with high critical current and low loss are needed to develop. NbTi/Cu5Ni superconducting wire with filament number of 12960 and 10080 and Cu/Sc ratio of 2.0 were designed and fabricated by double stacking method. The microstructure and influence of aging heat treatment on the critical current density and break times of NbTi/Cu5Ni superconducting wire are presented in this paper. After the process optimization, NbTi/Cu0.5Mn superconducting wire with the critical current density (Jc) of 2902A/mm_² at 5T 4.2K, with the hysteresis of 34.2 J/cm_³ at ± 3T was achieved in mass production.