The invention discloses an anti-collision ring segment connecting flange and a bridge anti-collision ring manufacturing method, which relate to the technical field of bridge protection. The anti-collision ring segment connecting flange comprises a flange plate, a connecting plate and a positioning force transmission assembly, wherein the flange plate is in a shape of semicircle, and has bolt holesuniformly formed therein; one side edge of the connecting plate is welded to the side surface of the flange plate, and rectangular grooves are formed in the other side edge at equidistance; and one end of the positioning force transmission assembly is fixedly arranged in one of the rectangular grooves of the connecting plate, and extends along the vertical direction of the semicircular surface ofthe flange plate. The anti-collision ring segment connecting flange replaces a concave-convex head structured plug pin connecting method of the existing anti-collision ring segments by using threadedribs swathed with glass fibers as main force transmission components, improves the connecting strength between the anti-collision ring segments on the basis of satisfying the structural strength andforce transmission effect of the anti-collision ring segments, and solves the problems of loose and destroyed connection and segment separation of the anti-collision ring segments.