The invention relates to a novel cam shaft phase regulator rotor, which comprises a rotor, wherein blade grooves are averagely formed in the outer periphery of the rotor; a lock pin mechanism is arranged on the rotor and comprises a lock pin hole and rectangular oil through grooves formed in the two sides of the lock pin hole; a plurality of balance weight regulating holes are formed in the rest blank part on the rotor. The novel cam shaft phase regulator rotor has the advantages that the balance weight reducing holes are formed in the rotor; in the rotor rotating process, the gravity center deviation of a cam shaft phase regulating mechanism is reduced; the inertia force is reduced, so that the integral cam shaft phase regulating mechanism maintains good balance.