To improve curing process and to ensure the the launch safety of casting plastic bonded explosives(PBX), the strain change in the process of transition of from liquid to solid for casting PBX was measured by a self-designed-made indirect stress sensor.The effect of curing temperature on the curing stresses of casting PBX was studied. Results show that curing process of PBX includes three stages: the rapid thermal expansion from room temperature to curing temperature, the thermal expansion and crosslinking shrinkage at curing temperature and the shrinkage at cooling stage. The defomation of the test bottles was studied. The casting solidification strain of casting PBX was calculated according to the defomation. The solidification temperature has an abvious effect on defomation of PBX. When the solidification temperature are 100, 90, 80, and 60 ℃, the maximum curing stresses of PBX are 2.14, 0.72, 0.56, and 0.29 MPa, respectively, and the shrinkage stresses of PBX networks are 0.29, 0.25, 0.24, and 0.21 MPa, respectively, revealing that the curing temperature at isothermal curing stage has a greater influnce on the thermal stress and shrinkage stress, the higher curing temperature, the bigger curing thermal stress and shrinkage stress. According to the strain-time curve of the solidification process, the low temperature curing to reduce the curing stress tn the earlier stage and elevanted temperature in the later stage of the curing stress changes smoothly are taken to improve the efficiency of variable temperature curing process.