The utility model relates to a safety helmet with a function of reminding staff to correctly wear the safety helmet. The safety helmet comprises a safety helmet body and is characterized by further comprising a first microswitch, a second microswitch, an alarming circuit and a direct-current power supply. The alarming circuit and the direct-current power supply form a loop. The first microswitch and the second microswitch are parallelly serially connected to the loop. The first microswitch is disposed on the lateral brim of the safety helmet body, and the first microswitch is off when the jaw band of the safety helmet body is tightened and is on when the jaw band is loosened. The second microswitch is disposed on the upper portion of the inner side of the safety helmet body, and the second microswitch is triggered to turn off favorably when a user wears the safety helmet. If the fact that the user wears the safety helmet but the jaw band is not tightened, an alarm is given out to remind the user to wear the safety helmet correctly, and accidents caused by habitual incorrect wearing of the safety helmet are avoided.