Abstract: The invention discloses a one lumbar zero-profile fusion system, including a holder, opener and nailing machine. The fusion system contains a fuser body, front support block, rear support block and adjustable lever; the fuser body covers the upper fuser body I as well as lower fuser body II, matching with the upper fuser body I; both ends of the fuser body connect to the front support block and rear support block, both of which connect to an adjustable lever; the adjustable lever goes through the said fuser body; rear support block and fuser body are connected with a fixed plate; the left and right side of the fixed plate are equipped with oblong holes which are connected to the fuser body by screw axle; and, the holder is equipped with long circular projection matching with the said oblong hole.