The invention discloses an occipital screw rod connector which consists of an occipital plate, a U-shaped connecting base, a screw plug and a retainer ring, wherein the occipital plate is a swallow-shaped triplex plate with a straight plate in the middle and oblique arm plates at two lower sides, the straight plate is provided with a group of screw holes in which occipital screws are screwed, theoblique arm plate is provided with an elongated slot for adjustment; the U-shaped connecting base is provided with a U-shaped opening groove for receiving a connecting rod in need of connection, a U-shaped opening inner hole of the U-shaped connecting base is provided with the screw plug, and the bottom part of the U-shaped connecting base is provided with an outer edge platform; and the retainerring is an opening-type gasket. The occipital plate and the U-shaped connecting base can be connected into one body with the retainer ring, and the U-shaped connecting base can be movable and rotatable along the elongated slot of the oblique arm plate. When the connecting rod in need of connection is placed in the U-shaped groove of the U-shaped connecting base and the screw plug is screwed, the occipital plate, the U-shaped connecting base, the opening-type retainer ring and the connecting rod can be firmly fixed together.