The invention provides a multifunctional safety helmet. The multifunctional safety helmet comprises a helmet shell, a helmet lining, a jowl band and a back band. The helmet shell is hemispheric, the helmet lining is located in the helmet shell, a buffering gap is reserved between the helmet lining and the helmet shell, the back band is arranged on the back edge of the helmet shell, a mini-type head lamp is assembled at the position, close to the front end, of the helmet shell, a Bluetooth headset is assembled at the position, close to the side edge, of the helmet shell, an LED light source is adopted in the mini-type Bluetooth headset, and the mini-type head lamp and the Bluetooth headset are assembled in corresponding assembling grooves in the helmet shell in a buckle connecting mode. Ear shielding check curtains are connected to the left lower edge and the right lower edge of the helmet shell, matched bonding areas are arranged on the ear shielding check curtains and the helmet shell, and the ear shielding check curtains are made of heat preservation thickened lint. The night engineering operation is facilitated, a phone call can be made and answered conveniently while the double-hand operation is carried out, the production efficiency is improved, the structure is compact, and using is convenient.