In order to avoid the pollution of the water environment by the floating dock and the liquid pollutants produced in its operation,this paper takes the 48 000 t lifting floating dock as an example,and on the basis of meeting the latest environmental protection laws and regulations,as well as in combination with the existing environmental protection technology,puts forward a technical scheme for the physical pollution prevention of various liquid pollutants.By adopting the anti-pollution structure of floating dock and the discharge control of floating dock etc,it can effectively prevent the pollution of liquid pollutants to water environment.This study can be used for reference to the anti-pollution design technology of floating dock and provide reference for the relevant anti-pollution design and construction standards of floating dock.