Long-life maintenance-free bridge expansion device and waterstop belt

The invention relates to the field of road bridges, in particular to a long-life maintenance-free bridge expansion device and a waterstop belt. The waterstop belt comprises a waterstop belt body, thewaterstop belt body comprises a waterstop belt lower layer and a waterstop belt upper layer closely fitted with the waterstop belt lower layer, the waterstop belt lower layer is made of rubber, and the waterstop belt upper layer is made of steel wire meshes or gap steel plates. The waterstop belt has the advantages that a protective structure is added to the waterstop belt by the aid of the structure, namely, new steel wire meshes or gap steel plates are additionally arranged on the waterstop belt, heavy stone pieces can be prevented from breaking the waterstop belt, people can be prevented from poking the waterstop belt, water can be more effectively led out, corrosion of a bridge body due to the water can be prevented, expansion of the waterstop belt cannot be affected by the steel wiremeshes or gap steel plates