Abstract: Based on the analysis of weakness on the safety of traditional electric detonators, a BJ-l safety electric detonator initiating system and its corresponding safe examination technique were successfully developed. By leading false foot wires and taking advantage of the transmitting frequency band of Mo-Zn ferrite, detonators in this new system can completely impede the direct induction of outside crosstalk that may cause casual firing in the ordinary as well as eleclromagnetic ones. Possible causality by lightning was discussed. Results are presented, of its safety tests on resistance to direct and alternating current, electrostatic, and crosstalk induced by damp leakage in saturated salty water.