Helmets are widely used in sports activities, known as a bicycle helmet, mountain off-road helmets, skating helmets, ski helmets, rock climbing, helmet, etc., these helmets, its main function is in the people in thesports activities after a fall can be useful in preventing injuries of the head, the working principle of safety helmet is commonly when unexpected attack, and when the head hit the pavement, On the one hand, with its slick appearance, the impactwill be taken forward, reducing the time the force stays on the head, and then reducing the damage to the head and brain may be suffered. Visible safety helmet on market now, itsstructure is roughly same, all is in the cap is equipped with buffer layer in the crust; but because of the different productionart, there exists a big difference, the role of practical use such as glue is to buffer layer adhesion to cap shell, simple in the process of adhesive in the cap shell with gaps between buffer layer, results in the decrease of practical seismic cushion, It can even affect the safety of athletes.