The invention relates to a safety helmet warm in winter and cool in summer and a use method thereof and belongs to the technical field of personal protection in safety production. According to the technical scheme, a warming plaster or no-water ice bag is arranged in a functional storage box (7), the functional storage box (7) is fixed to a functional helmet top frame (15) in a binding mode through storage box fixing hole belts (8) with the fixing function, and then functional helmet top frame plug-pins (6) are inserted into helmet insertion grooves (2), so that the functional helmet top frame and a safety helmet body form a whole. A layer of heat-insulation heat-preserving liner is additionally arranged on the inner side of the safety helmet, and the heat-preserving and heat-insulation functions can be achieved. When a user wears the safety helmet in summer, the no-water ice bag is placed in the functional storage box, the situation that the temperature of the head is too high and sweat loss is severe is avoided, and the sunstroke-prevention and cooling functions are achieved. When the user wears the safety helmet in winter, the warming plaster is placed in the functional storage box, the temperature in the helmet is increased, and the head is protected against cold injuries. The wear comfort degree of the user is improved, and the situation that the user refuses to wear the safety helmet and other habitual traffic offence caused due to weather reasons are further reduced and avoided.