Safety helmet for power construction first-aid repair

The invention relates to a safety helmet for power construction first-aid repair, and belongs to the technical field of construction protection. The safety helmet comprises a shell, the front end of the shell is provided with a brim, the shell is internally provided with a head top plastic sheet, the edge of the head top plastic sheet is provided with four plastic connecting ribs, and the shell is internally provided with four main supporting pieces and four auxiliary supporting pieces. Four threaded sleeves are arranged on the wall of the shell in a penetrating mode, bolt connecting pieces are installed on the threaded sleeves in a penetrating mode, blind holes are formed in the tail ends of the bolt connecting pieces, telescopic rods are arranged in the blind holes, two limiting protrusions are arranged on the lower portion of each telescopic rod, springs are arranged on the telescopic rods in a sleeving mode, connecting pieces are fixedly arranged on the outer side faces of the main supporting pieces, each