The invention discloses an adjustable composite damping rubber pad, and belongs to the field of rubber pads, the adjustable composite damping rubber pad comprises two oppositely arranged rubber pads, a buffer device is arranged between the two rubber pads, the buffer device comprises a flexible rubber sleeve, two groups of friction rings are arranged in the flexible rubber sleeve, the friction rings are of a circular ring structure with an L-shaped section, and the friction rings are arranged in the flexible rubber sleeve. The two friction rings are arranged in a buckled mode, the sides, away from each other, of the two friction rings are fixedly connected with the rubber pad, a fixed magnetic ring is arranged on one side of a circular ring of each friction ring, a cavity is formed in the other side of the circular ring of each friction ring, a sliding magnetic ring is slidably connected into each cavity, and the magnetism of the sliding magnetic rings is the same as that of the fixed magnetic rings. According to the rubber pad, the compression deformation quantity of the rubber pad can be effectively reduced, the service life of the rubber pad is prolonged, and the rubber pad has market prospects and is suitable for popularization.