Multifunctional helmet

The invention relates to the technical field of construction protection, and particularly discloses a multifunctional helmet which comprises a helmet body, a cap picking alarm mechanism and a controller, the helmet body comprises a protective shell and a buffer pad, the cap picking alarm mechanism comprises a wireless transmitter, a wireless receiver and an alarm, the communication distance between the wireless transmitter and the wireless receiver is not larger than two meters, and the controller is connected with the wireless transmitter. A wireless receiver is arranged in the helmet body, a storage groove used for storing the wireless receiver is formed in the wireless transmitter, power supply batteries are installed in the protective shell and the wireless transmitter, a talkback mechanism is further arranged between the inner side of the protective shell and the buffer pad, and a fixing mechanism for preventing the helmet body from slipping off when the helmet body is worn is further arranged at the low