The utility model relates to the field of building engineering technology, and in particular to a heat-dissipating safety helmet for construction workers, comprising a safety helmet body, wherein the top of the safety helmet body is plugged and fixed with a telescopic rod, and the surface of the safety helmet body is covered with a spring, the bottom end of the telescopic rod is fixedly connected with a rubber pad, the top end of the telescopic rod is fixedly connected with a limit block, and a tie rod is fixedly connected on the limit block, the tie rod is inserted and fixed on a bearing座上, and the bearing座 is fixedly connected to the shell, the shell is fixedly installed with a rotating shaft, and the rotating shaft is fixedly sleeved on the safety helmet body. The utility model device is also provided with an air inlet, through which air enters the air inlet on both sides of the safety helmet body, so that air circulates and dissipates heat inside the safety helmet, reducing the sweating of the user wearing the safety helmet in hot air, which is very practical.