The invention belongs to the technical field of a safety device in the power construction maintenance operation, and particularly relates to a multifunctional safety helmet. With the adoption of the multifunctional safety helmet, the problems of potential safety hazards resulting from unavailable direct effective communication between the personnel working at heights and the ground are mainly solved. The technical scheme is that the functional safety helmet comprises a safety helmet, wherein earmuffs are arranged on the safety helmet; an audio-video communication system is arranged on the safety helmet; the audio-video communication system is connected with a rear-end dispatching guidance server installed in a command room through wireless signals; and the audio-video communication system consists of a video collection unit, a microprocessor CPU (Central Processing Unit), an audio input-output processing unit, a radio frequency power amplifier unit, an antenna unit, a memory module unit, an Ethernet module unit and a power module unit. The multifunctional safety helmet has the advantages of simplicity in operation and convenience in use; and in addition, the safety and the working efficiency are improved for practicing personnel.