Abstract：The safe distance of propagation blast for industrial detonators is tested. The lift-descending method is used in the experiment. The safe distances of propagation blast for 100 DDNP primary explosive carton detonators, 100 DDNP primary explosive aluminum detonators, 100 non-primary explosive carton detonators, and 100 non-primary explosive carton detonators for mining use are obtained. For DDNP primary explosive detonators, the safe distance of propagation blast for aluminum detonator is greater than that for the cardboard detonator. The safe distance of propagation blast for DDNP primary explosive detonator is greater than that for non-primary explosive detonator. The safe distance of propagation blast for non-primary explosive carton detonator for mining use is less than that for non-primary explosive carton detonator. The overpressure measurement in the blast field of detonator is carried out. There is a major difference between calculated results for the pressure field with the experiment results for that. The reason for the difference is analyzed. The ability of detonator initiation is a complex issue. The experimental results indicate that the major factor of detonation for one detonator is the shock wave of the main detonator, however, for the 100 detonators, the shock wave and explosive gases sent by main detonators explosion are the direct cause for propagation blast by rest of detonators.