The invention discloses an adjustable buffering door hinge. The adjustable buffering door hinge comprises a door frame hinge body and a door hinge body hinged to the door frame hinge body; the door hinge body comprises an installing sleeve, a door hinge block, an installing panel and a buffering device located beside the door hinge block, and the door hinge block and the installing panel are installed on the installing sleeve; the door hinge block is provided with a hinge arm, a cam fixing column and a hinging convex block; the hinge arm is a curved hinge arm; one end of the hinge arm is hinged to the hinging convex block, and the other end of the hinge arm is hinged to the door frame hinge body; and the cam fixing column penetrates the installing panel and the door hinge block to fix the installing panel and the door hinge block on the installing sleeve. The adjustable buffering door hinge is simple and scientific in design, compact and firm in structure and large in bearing force, no noise is caused and it is avoided that collision happens and a door body is damaged during door opening and closing, the structure can be hidden, a gap between door plates can be adjusted by means of the cam fixing column, and installing is convenient.