The invention discloses a nonmetal bulletproof helmet reducing non-penetrability damage and a manufacturing method thereof. The nonmetal bulletproof helmet comprises a helmet shell and buffering suspension parts arranged on the inner surface of the helmet shell. In the helmet shell, high-strength PE fiber non-woven cloth serves as a main part of the helmet shell, carbon fiber non-woven cloth is inserted and folded in the high-strength PE fiber non-woven cloth and serves as a middle layer or an outmost layer of the helmet shell, and polyethylene films are arranged between the adjacent non-wovencloth; the non-woven cloth and the polyethylene films are stacked in an intersected manner and then subjected to hot pressing preforming and cold pressing preforming in sequence to obtain a preformedhelmet, the preformed helmet is covered with glass fiber fabric dipped with thermosetting polymer resin and then subjected to hot pressing preforming and cold pressing preforming in sequence again toobtain a prefabricated helmet shell, and a final helmet shell is obtained by means of electronic beam irradiation treatment. The deformation resisting ability of the bulletproof helmet is improved, instant swelling is reduced, harm caused to the head of a person by non-penetrability damage is reduced, and the bulletproof helmet has the beneficial effects of being high in specific modulus, high inbending modulus, high in compression strength, high in shear strength and the like.