This paper introduces the use of prestressed concrete prefabricated parts to build disaster prevention structures in Japanese highway projects. Disaster prevention structures can be divided into two kinds: snow disaster prevention and rock fall prevention and landslide prevention. It can also be divided into preventive engineering and protective engineering structures, such as snow cover, avalanche fence, avalanche safety tunnel, avalanche railing, rock fall, rock fall safety tunnel and rock fall railing, as well as hanging fence with FRP, cantilever beam with foam styrene to prevent rock fall railing and so on.