The general layout plays a pivotal role for coal-fired power plants, whose investment accounts for 10%~15% of the whole project static investment. And the layout optimization has a great influence on the operation management costs. Huaneng Haimen Power Plant made more attempt on general layout than other power plants in coastal areas, such as the coal handling gallery through the chimney, drainage taking by open channel in a maximum extent, and so on, which could provide reference for related projects.