Throughseveral yearhdd investigation and data analsis in laboratary in the area of the Jinzhou Bay,this paper described the hydraulic geomorphological feature of the beach face, the changes of beach profiles,the micromorphology and zoning,and then discussed the change of tidal flat zone and underwater shallow zone by the methods of the repeated,survey the comparison between old and new charts and the determination of sedimentation rate.The tidalflat of the bay is dominated by week accumulation,and the accumulation is more intersive flood perild which is about 11-25 mm The two sides of the river are mainly dominated by erosion in flood period and the mean erosion depth is 16-35 mm,and even deeper in the center of the eriver.The shallow zone which is 0-5m under water is not affected by abrupt erosiOnaccumulation,and belongs to a stable part.The accumulation estimated is 6 mm/a by the comparis on beween old and new charts.The sedimentation rate is 1-5 mm/a by the determination of 21pb of the 7 core samples and 2-4 mm/a by silt calculation, The three methods show almost the same results.