The radio frequency (RF) sensitivity of semiconductor bridge (SCB) initiator can be improved by negative temperature coefficient (NTC) thermistors and temperature is the key factor for the protection effect. In order to analyze the influence of NTC thermistors on SCB electro-explosive performances at different environment temperature, constant current (1A) was forced to flow through igniters for 300 s at room temperature(25 ℃)and high temperature(70 ℃). Results show that about 59% current of small size SCB (S-SCB) is shunted by NTC thermistor at 25 ℃, and reaching the maximum (63%) at 70 ℃. Furthermore, with capacitor discharge experiment, the electro-explosive performances of the SCB initiators in parallel with NTC thermistors were discussed at above temperatures. Results indicate that burst time and consumption energy of large-SCB(L-SCB) initiators have no significant change at two temperature. But, as for S-SCB, burst time grows from 5.94 μs to 7.18 μs, and consumption energy reduces from 0.388 mJ to 0.178 mJ when temperature ranges from 25 ℃ to 70 ℃.