The utility model relates to a double-arrow type pier protection device. The double-arrow type pier protection device comprises at least one anti-collision structure and a connecting structure used for connecting the adjacent anti-collision structure or connecting the anti-collision structure with a pier. The anti-collision structure comprises an outer-layer head-on collision panel, a middle energy absorption supporting structure and an inner-layer supporting plate. The middle energy absorption supporting structure is a negative poisson ratio structure formed by energy absorption units in an array mode according to the size of a pier. Each energy absorption unit is of a double-arrow structure, the energy absorption unit located on the outermost layer is connected with the outer-layer head-on collision panel, and the energy absorption unit located on the innermost layer is connected with the inner-layer supporting plate; panels for sealing are installed on the top face and the bottom face of the anti-collision structure, so that the whole anti-collision structure forms a sealed box body. The anti-collision structure has the characteristic of negative Poisson's ratio, the energy dissipation time is effectively prolonged, the deformation degree of the energy absorption material is effectively increased, the protection effect of the anti-collision device on the pier is greatly improved, and the structural stability is also enhanced; the energy absorption units are periodically arranged, the structure is simple, and the production process is simple.