The utility model discloses a composite seamless expansion joint for bridge, mould rubber including left bridge, right bridge and bullet, for the bridge seam between left bridge and the right bridge, fill on the inboard top of bridge seam has polyurethane foam, and the resistance to compression backing plate is installed through set screw in polyurethane foam's top, and fill at the top of resistance to compression backing plate has the bullet to mould rubber, and the inner chamber that rubber was moulded to the bullet is equipped with first steel sheet and second steel sheet respectively, and the piece evenly distributed of first steel sheet and second steel sheet has the spring. During installation,