Based on the Xiesha shoal in Quanzhou bay,it is proposed to construct cofferdams in the west,north and east of Xiesha shoal and a quay wall in the south of Xiesha shoal.The closed region,surrounded by the cofferdam and the quay wall,is backfilled by the sand dredged from front waters.Thus the cofferdam,the quay wall and the backfilled sand form the Xiutu artificial island.This paper analyzes the general design and key technologies related to the design of the Xiutu island,which contains the plane layout,plane arrangement,phased implementation plan,cofferdam structure,wharf structure,land formation and other major aspects related to the design of the artificial island.This study will provide reference for similar projects.