Bridge pier anti-collision and anti-scour facility based on construction temporary bridge and construction method

The invention relates to a bridge pier anti-collision and anti-scour facility based on a construction temporary bridge and a construction method. The bridge pier anti-collision and anti-scour facility comprises a sacrifice pile located on the upstream of a bridge pier in the downstream direction of water flow, a concrete platform fixed to the top of the sacrifice pile and lower than the normal water level, and a prefabricated straining beam fixed between the concrete platform and the bridge pier. The sacrifice pile comprises an outer pipe pile formed by a temporary bridge pile foundation and a miniature steel pipe pile located in the outer pipe pile, concrete is poured into the outer pipe pile and the miniature steel pipe pile, and the lower ends of the outer pipe pile and the miniature steel pipe pile are buried in a riverbed. The prefabricated straining beam comprises a central steel plate, an outer square steel sleeve and a hard material, the two ends of the central steel plate are connected with the concr