In order to assess the safety of a electric squib in different electrostatic discharge(ESD) environments, Human-Body model(HBM), Body-Machine model(BMM) and Machine model(MM) were used to study the safety of the electric squib using two discharge ways of pin-pin and pin-shell with 25 kV discharge voltage. Results show that the decrease of bridge wire resistance is less than 2.1% when ESD is applied to pin-pin, and none of the 40 electric squib samples is ignited. The calculated discharge power of MM model is 104.17 MW, and 6 of 10 samples are ignited when ESD is applied to pin-shell. The analysis indicates that the safety of electric squib in different ESD models is determined by the power and the electric current of ESD, and the open circuit of varistor is the main reason for electric squib samples igniting.