The utility model discloses a transmission shaft rubber torsional damper belongs to automobile technical field, is to comprise quality inertia ring, wheel hub inner core and damping rubber member, and quality inertia intra -annular portion is placed in to its wheel hub inner core, is equipped with the damping rubber member between wheel hub inner core outer wall and the quality inertia intra -annular wall and bonds, and axial interval equipartition spacing chamber and is ventilated the chamber on the ring body of damping rubber member, spacing intracavity all arrange the centering spacer pin in. Excircle and the rubber of mediate wheel hub inner core bonded in the quality inertia ring surface machining helicla flute and the dextrorotation ripples of 1.5 pitchs, increased the bond area 42% of damping rubber component, can improve the damping rubber axial and the adhesive strength that radially reaches direction of rotation. Damping rubber is whole to adopt hollow structure, and the air current is had friendly relations, damping rubber good heat dissipation, improves torsional damper's life, the ring equipartition straight line groove on centering spacer pin circular cone post surface, guarantees the high -speed steady state when rotatory of rubber torsional damper.