The invention proposes to solve the problem of high cost and instability of using seawater to generate electricity, and provides a method for artificially manufacturing sea surface drop to guide seawater circulation to generate electricity and comprehensively utilizing seawater. The method includes the main structural elements and auxiliary structural elements, and selects the coastal junction area suitable for negative excavation to build a sea blocking dam, so that the sea level and the artificial negative excavation underground reservoir form an altitude difference, and at the same time guide the seawater to impact the power generation under the underground reservoir The unit generates electricity, and while pumping seawater for use onshore, it also uses wind power to support water pumping and seawater comprehensive utilization projects. The invention can save land resources for seawater development, use seawater and wind power to generate electricity stably on a large scale around the clock, provide a large amount of power for national economic construction, promote the upgrading of seawater power generation and wind power generation equipment manufacturing industries, and provide a large amount of disposable clean seawater for the marine industry , increase the added value of the marine industry, and create a new path in which clean energy economy and circular economy complement each other.