Differential aeration sluice device

The present invention relates to a kind of differential-type aerated deflecting bucket. It includes bucket body, and its characterized by that on the bucket body locally are set several small deflecting buckets, these small cleflecting buckets and said bucket body are identical in the slope-raising point, and the overflowing surfaces fromed from these small deflecting buckets and said bucket body are convexly-concavely alternated. Said invention also provides the working principle of said differential-type aerated deflecting bucket. Said deflecting bucket can effectively raise amount of air entrainment and can effectively protect outlet structure against cavitation erosion.