The utility model discloses an anticollision roof beam and have buffer stop of crashproof roof beam relates to the bridge protection field, and crashproof roof beam includes a shell the shell is hollow structure, just the shell is " V " shape, the inside of shell is provided with a plurality of lobes, the lobe intussuseption is filled with elasticity dissipation structure, elasticity dissipation structure includes the lattice case, the lattice case is airtight structure, the lattice incasement is filled there is elastic material. The utility model discloses an anticollision roof beam is when receiving ship collision, and the structural arrangement of V -arrangement can make boats and ships follow the production of crashproof roof beam surface and slide, and the reduction boats and ships exchange with the kinetic energy of pier, every lobe is inside all packs flexible dissipation structure, and elasticity dissipation structure has better elastic -plastic deformation ability, absorb when effectively lengthening the striking time and the partial energy that clashes into of dissipation, the utility model discloses an anti -collision beam is stable, the difficult damage, and anticollision function is reliable, and long service life is applicable to the marine environment that the stormy waves effort is big.