Correctable precision level meter

The utility model discloses a correctable precision level, which consists of a common level, a metal cover, a metal base, three adjusting screws and steel balls, and is characterized in that the lowersurface of the metal base is flat, the upper part of the base is processed into a cavity, the common level can be just accommodated in the cavity, and a circular groove is formed in the center of theupper part of the base; a steel ball is placed in the circular groove, a common gradienter is stacked on the steel ball, and the circular groove is formed in the center of the lower portion of the common gradienter and stacked on the steel ball. Wherein the metal cover is sleeved on the common gradienter, and the three adjusting screws penetrate through the metal cover and are screwed on the metal base, so that all the components form a whole; position points of the three adjusting screws form an equilateral triangle, and the center point of the equilateral triangle is just the center point of a common gradienter. The