In present paper, NbTi/Cu wire the low copper-to-superconductor ratio of 1.3 and filament number of 630 was prepared using high homogenous Nb47Ti alloy bar and oxygen-free copper firstly. New type of aging heat treatment (“405℃/3h + 405℃/3h + 420℃/20h + 420℃/40h + 420℃/80h”) was proposed. Comparing with the traditional heat treatment, this new type heat treatment can largely improve the critical current density of NbTi superconducting wire to 3208A/mm2, with an increment of 17.5%. Only when the pre-heat treatment times is equal to or more than 2 times, huge of nucleation can be formed and critical current density can be improved obviously. In addition, Critical current densities of wire under three pre-strain conditions (4.64, 5.35 and 6.25) all get the peak value when final strain is between 5.0~5.2.