Low profile offset typespinal fusion device

A low profile offset type spinal fusion device is provided, which includes: a first screw has a ring of flange; a connection base has penetration part with a first hole and connection part which is disposed on one side of the penetration part, and height of top surface of the connection part is equal or lower than height of top surface of the penetration part, and a concave is formed on the connection part for receiving a connecting rod, and the connection base is sleeved on the first screw by the first hole and the first hole is against on top of the flange, opposite two ends of the first screw are protrude out of the first hole; a nut is screwed with the first screw and one side of the nut is against on the penetration part, the nut and the flange are on opposite surfaces of the first hole respectively; a compression part is screwed and compressing the connecting rod in concave.