Steerable prefabricated FRP anti-collision guardrail or prestress concrete bridge

A steerable prefabricated FRP anti-collision guardrail for a prestress concrete bridge comprises a prefabricated FRP anti-collision shell component. The prefabricated FRP anti-collision shell component is a hollow shell defined by an upper shell, an outer side shell, an inner side shell and a bottom shell. The bottom of the prefabricated FRP anti-collision shell component is filled with a concretebase. The prefabricated FRP anti-collision shell component is fastened and connected to a bridge. The outer side of the concrete base is provided with a reserved position for installing a steering roller. The steering roller is connected to the reserved position of the base through an axle. Constructional steel bars, vertical steel bars and W-shaped low-yield-point steel plates are arranged in the prefabricated FRP anti-collision shell component. A gap in the prefabricated FRP anti-collision shell component is filled with a filling material. The colliding and climbing energy converting mode of the concrete wall type