Pier anti-collision protecting ring

The utility model relates to the technical field of pier protection, in particular to a pier anti-collision protecting ring. The pier anti-collision protecting ring comprises a first anti-collision protecting ring arranged at the periphery of a pier in a surrounding manner and a second anti-collision protecting ring arranged at the periphery of the first anti-collision protecting ring in the surrounding manner; the first anti-collision protecting ring comprises a plurality of first anti-collision protecting units and a plurality of first connecting pieces; the second anti-collision protecting ring comprises a plurality of second anti-collision protecting units and a plurality of second connecting pieces. According to the pier anti-collision protecting ring, corresponding anti-collision protecting units can be manufactured according to the shapes and the sizes of piers, the anti-collision protecting units can be connected through the connecting pieces and can be quickly assembled and disassembled, and local anti-collision protecting units can be replaced to reduce cost; isosceles trapezoid grooves and square bulges, which are connected in an inlaying way, are arranged between the first anti-collision protecting ring and the second anti-collision protecting ring, so that energy absorption and energy dissipation effects are achieved, the energy dissipation time is long, the anti-collision effect is obvious and the pier can be effectively protected.