An experiment device of in-line explosive trains(slapper detonator—HNS-Ⅱ—JHB-1)was designed to study the explosive performance of in-line explosive trains. The output performance of slapper detonator used in the experiment were analyzed, and the explosive performance of in-line explosive trains under low temperature and normal temperature were experimented. The results show that, in this experiment condition, slapper detonator can reliably initiate the bare insensitive JHB-1 under the condition of less 8 mm transfer intervals; slapper detonator can also reliably initiate HNS-Ⅱ under the low temperature of -40 ℃, normal temperature as well as extend transfer interval; and finally, in-line explosive trains (slapper detonator—HNS-Ⅱ—JHB-1)can reliably detonate.