The thermal cook–off response of fuse explosive train is not only important in the view of safety point,but also challenges our understanding of the explosive materials.When the explosive material was ignited,it was different from the primarily chemical and physical state in the case of slow and fast cook-off.To investigate the characteristics of the thermal reaction for JH-14C in the fuse explosive train,multi-point measured temperature cook-off tests were carried out at different heating rates.A 3D model of the fuse in medium and large caliber munitions was developed to simulate the thermal and chemical behavior in the thermal ignition at different heating rates which were calculated by FLUENT.The results of these numerical simulations are presented,together with some possible explanations of the behavior and discussion of the implications to modeling this response.The results show that the ignition temperature of the fuse explosive train is not much different and the ignition position is at the inner of booster charge of fuse explosive train on the condition of different heating rates.The ignition time decreases and the ignition position moves from the center to the end of the booster cylinder edge with the increase of the heating rate.The useful information can be provided to ensure the thermal reliability and safety of fuse in the storage and transportation.