The utility model discloses an automatic reset base for a gradienter, which comprises a first shell, a second shell arranged above the first shell, a movable connecting plate arranged above the second shell, the gradienter arranged above the movable connecting plate, a battery compartment arranged in an inner cavity of the first shell, and a slide rail arranged on the side wall of the battery compartment. A motor bin is arranged on one side of the sliding rail, a sliding plate is movably arranged above the sliding rail, a connecting block is arranged above the sliding plate, a plurality of threaded cylinders are arranged above a movable connecting plate, an arc-shaped sliding groove is formed in an inner cavity of the second shell in a penetrating mode, and lug plates are arranged on the two sides of the movable connecting plate. Through cooperative use of the groove-shaped optocouplers, the light shielding plate, the control panel and the power switch, the deviation direction of the gradienter and whether the gradienter is in an aligning state or not can be automatically judged through the two groove-shaped optocouplers and the light shielding plate, after the power switch is pressed down, automatic aligning of the gradienter can be achieved through the control panel, operation is easy and convenient, and practicability is high.