This paper studies the back-drawing of plastic drainage plate based on Yangshan deep-water port phase Ⅲ(stage Ⅱ) plastic drainage plate construction，and proposes to adopt the looped pipeline to fix the plastic drainage plate end lap and solve the problem of back-drawing.Furthermore，this paper probes into the location of wire rope bayonet in the construction process of the drainage plate. Using the pulley block instead of the hoister，the looped pipeline’s lag uplift and catheter’s uplift can end synchronous and the back-drawing can be avoided to the greatest extent without influencing the construction progress and increasing the cost.