Safety helmet

The utility model discloses a safety helmet which comprises a helmet body and a helmet rim. The safety helmet is characterized in that the a power supply device and a collision warning device are arranged in the helmet body, an illumination device is arranged on the helmet body, multiple circles of light reflecting straps are arranged on the helmet body, anti-dust masks are arranged in the bottom face of the helmet rim, and the power supply device is electrically connected with the collision warning device, the illumination device and the anti-dust masks. The safety helmet is capable of distinguishing the collision strength borne by the safety helmet, warning is sent out in time once a person is injured to earn rescuing time, the purpose of reducing casualties in engineering construction is achieved, and the safety helmet has the anti-dust function and the safety prompting function.