Floatation machine level adjusting mechanism

This invention relates to a level adjustment unit for an air-floating machine composed of two water blocking boards and an adjustment unit including a notch nut, an open-end pin, a sealing loop, a screw rod, rubber pads and a square nut characterizing that one blocking board is fixed and the other is put closing to the fixed one with a runner moving by the adjustment unit, and the top edges of both two boards include a row of water breaches and the area of which is less than that of the closed part between adjacent water notches. Advantages: 1, strong wear ability to fluctuation of water flow, 2, practical and effective, easy to be operated especially for places with limit spaces, 3, evident result in removing dregs, 4, bright prospect for commercial development.