The invention provides a multifunctional hydraulic buffer hinge. The multifunctional hydraulic buffer hinge comprises a first hinge, a second hinge, a screw rod, a sheath, a spring, a roller pin and a hydraulic oil cylinder, wherein the screw rod is sleeved with the sheath and is fixedly connected with the first hinge, the sheath is fixedly connected with the second hinge, the screw is provided with a hollow cavity, the spring and the hydraulic oil cylinder are arranged in the hollow cavity, one end of the spring is provided with an adjusting screw used for adjusting compression of the spring, the other end of the spring is abutted against the end face of the hydraulic oil cylinder, and the end of a push rod of the hydraulic oil cylinder is fixed on the screw. The outer wall of the screw is provided with a helical slot, the sheath is provided with a rolling slot, and the roller pin is arranged at the end of the hydraulic oil cylinder and penetrates the helical slot and the rolling slot. The multifunctional hydraulic buffer hinge has the advantages of simple structure, low manufacturing cost and long service life and the advantage that functions of automatic door closing by buffering, door stopping positioning, door closing speed and force adjusting are integrated.