The brim of a V-shaped safety helmet has multiple functions. Firstly, it has a sunshade effect. When working outdoors, it can block direct sunlight from the eyes, reduce glare interference on the line of sight, and improve work safety. Secondly, it has a guiding effect. When it rains or there is liquid dripping, it can guide the liquid to flow towards both sides, avoiding direct dripping onto the face or neck. Thirdly, enhancing structural stability, the brim and shell of the helmet form an integrated structure, which to some extent increases the impact resistance of the safety helmet, helps to disperse the impact force from diagonally above, and provides more comprehensive protection for the head.