The invention discloses a sintering end point judgment method adopting a pre-sintered ultra-thick material layer. In a pre-sintering technology, upper and lower layers of mixtures are set to reach sintering end points at a tail preset point simultaneously, air speed measuring devices are mounted above sintering machine trolley material layer surfaces corresponding to air bellows corresponding to the preset sintering end points and air bellows on front and back sides, can swing by 200-500 mm in the trolley moving direction and can move up and down in the direction perpendicular to a trolley, no less than two air bellows are mounted corresponding to positions where the air speed measuring devices are mounted and on front sides of the air bellows corresponding to the preset end points, no less than one air bellow is mounted corresponding to positions where the air speed measuring devices are mounted and on back sides of the air bellows corresponding to the preset end points, in the air speed measuring process, points are determined by using returned real-time air speed results as longitudinal coordinates and using corresponding air speed measuring positions as horizontal coordinates, the points can be connected by broken lines, and whether sintering reaches the end points can be judged according to three following conditions.