The invention discloses a method of intertidal zone wind power for accessing a power grid. The method comprises the following steps: step 1, determining an influence factor set; step 2, evaluating the power grid state; step 3, dividing the planning area into supply districts which are of different layers, connected but independent; step 4, carrying out load prediction, and performing load characteristic analysis and prediction with some emphasis; step 5, formulating a transformer substation layout and a wire frame scheme; step 6, analyzing wind power consumption capacity in the planning area and each supply district; step 7, determining wind power integration mode of the intertidal zone wind power access applicable for each power supply district; step 8, carrying out scheme optimization; step 9, providing the final suggestion. By virtue of the method, in the power grid planning phase, the wind power resource characteristics and the power grid operation requirements can be both considered about to realize that the total investment cost for power grid construction is optimized.