Xiamen has marked its integrated coastal management (ICM) practice as PEMSEA's demonstration site since the 1990s. However, the role of Marine Functional Zoning (MFZ) in ICM has not been fully explored yet even though planning has been highlighted in some literature on Xiamen ICM mode. To showcase the contribution of MFZ as a practical approach to Xiamen ICM, the Nve dimensions of integration in ICM is applied as an analysis framework. Firstly, through compiling of the historical data and documents of the sea uses and marine environments, and socioeconomic status as well, the key drivers of initiating MFZ in the 1990s is summarized as increasing but incompatible and even conOicting sea uses, degrading marine environments due to negative effects of intensi-Ned human activities, and the lack of coordinating mechanism which has worsened the use-use and use-environment conOicts. Secondly, the technical guidelines and adaptive evolvement of Xiamen MFZ is introduced, and the achievements of Xiamen MFZ is explored. Based on the above analysis, the relationships of MFZ and ICM is looked into the dimensions of legislation, coordinating mechanism, scientiNc and technical support, integrated law enforcement and public participation; and how MFZ contributes to ICM in integration of dimensions of intergovernmental, inter-sectoral, land and sea, science and management, and multiple disciplinary is analyzed in-depth. It is concluded that MFZ has been a working approach in Xiamen to realize ICM from a conceptual call to a good practice on the ground, even challenges remain.