The invention is entitled 'high-efficiency seawater evaporation method', which belongs to the field of seawater desalination. The method is technically characterized in that the evaporation quantity of seawater is increased by taking the following measures of expanding a seawater evaporation boundary, raising the temperature of seawater, accelerating the flow velocity of the air in an evaporation chamber and the like, and the vapor is condensed into water. Various indexes of the fresh water generated by using the method meet the national-level drinking water standard. The method is energy-saving and efficient, and can save 60% of the energy and increase the benefits by 2.5 times when being compared with a distillation method; the requirement on heat is low, the solar energy can be directly utilized, and the waste heat of an engine or other energies can also be utilized.