The invention discloses a wireless networking technology-based safety helmet and a data transmission method thereof, belonging to the field of wireless communication. According to the safety helmet, a wireless networking technology is applied to the safety helmet by means of network management modules, multi-user group calling is realized, and the requirements are better met. When the safety helmet is started, an address list capable of being communicated with the safety helmet is initialized, and illegal access of other users in the communication process is prevented, so that the safety of speech communication is ensured; and the phenomenon of data receiving errors caused by collision is prevented by means of a back-off mechanism in the data frame transmission, so that the address list for the safety helmet is successfully initialized.