The invention discloses a horizontal stabilizer corrosion repair method for a helicopter. A honeycomb core material is replaced with closed-cell foamed plastic with comparative performance index; low-temperature or room-temperature solidified adhesive with good adhesion to a laminated board and closed-cell foamed plastic is selected according to the sustainable temperature of the horizontal stabilizer. The horizontal stabilizer corrosion repair method for the helicopter is simple and easy to operate, and can be executed on an original engine.