Multifunctional helmet

The invention relates to the technical field of safety protectors, and particularly, relates to a multifunctional helmet comprising a protective helmet, and a protective air bag assembly is fixed to the outer surface of the protective helmet. The protective air bag assembly comprises a fixing box. The fixing box is composed of two sets of first fixing pieces, two sets of connecting pieces and a second fixing piece. The two sets of connecting pieces are arranged on the two sides of the second fixing piece and are bonded and fixed to the second fixing piece through adhesives. One ends of the twosets of first fixing sheets are respectively bonded and fixed with the two sets of connecting pieces through an adhesive, and the other ends of the first fixing pieces are integrally connected and fixed to the outer surface of the protective helmet, an inflation assembly is fixed into the first fixing pieces, the inflation assembly comprises a fixing cylinder, and the outer white surface of the fixing cylinder is connect