Sand blowing and filling construction method suitable for coastal ecological wetland protection area

The invention discloses a sand blowing and filling construction method suitable for a coastal ecological wetland protection area. The sand blowing and filling construction method comprises the following steps that S1, the current coastal ecological wetland vegetation growth condition and environment are investigated and researched; s2, a hydraulic reclamation mud sand material is selected; s3, the hydraulic reclamation thickness and range are determined; s4, constructing a cofferdam; s5, carrying out a process test; s6, hydraulic reclamation and sand filling are carried out; s7, leveling is conducted after hydraulic reclamation; and S8, constructing a tidal diversion trench. According to the invention, the elevation of the open sea wetland is improved by adopting a sand blowing and filling process, back pressure can be formed on the seawall, transverse displacement of the seawall can be effectively avoided, the purpose of reinforcing the seawall can be achieved, and an ecological bank protection system integr