The present invention relates to a variable valve timing-phase controller, belonging to the field of engine technique. The invention comprises a shell body, a rotor, a chain wheel, a front end cap, a camshaft, a centre bolt, a vane, a diaphragm spring, a torsion return spring, an advance chamber, a delay chamber and a locking mechanism. The rotor and the camshaft are fixedly arranged through the centre bolt, and the front end cap, the shell body and the chain wheel are fixedly arranged through a drawbolt. The vane is fixedly arranged around the rotor, the rotor is connected with the vane through the diaphragm spring to ensure the tight attachment of the vane and the shell body. The torsion return spring is fixedly arranged between the rotor and the front end cap, a lock pin is movably arranged in the rotor, and the advance chamber and the delay chamber are respectively arranged at one side of the rotor opposite to a back end cap and are separated mutually. The invention avoids the elongation of the axial length of the camshaft and provides a very large phase adjustment range by using a symmetrical four-blade structure. The innovative design of an annular oil passage below the rotor solves the matching problem between the phase controller and the existing camshaft.