The utility model relates to an automatic breaker of an electricity safety helmet. The automatic breaker of the electricity safety helmet is characterized in that the electricity safety helmet automatic breaker comprises a machine shell, a cylinder body, a rotation shaft, a feed inlet, a feed outlet, an air inlet and an air outlet. The cylinder body is arranged in the machine shell, the air inlet and the air outlet are formed in bottom of the machine shell, opening and closing valves are arranged in the air inlet and the air outlet, the feed inlet is formed in the upper portion of the machine shell and communicated with the cylinder body, the feed outlet is formed in the bottom of the machine shell and communicated with the cylinder body, the rotation shaft is arranged in the axes of the machine shell and the cylinder body, 2-5 sets of spiral blades are arranged on the rotation shaft, and a screen is arranged at the bottom of the cylinder body. According to the automatic breaker of the electricity safety helmet, not only can an electricity safety helmet be broken efficiently, but also the breaking is thorough, safe and without danger.