Protection method for corrosion prevention of precast pile joint

The invention discloses a protection method for corrosion prevention of a precast pile joint, and belongs to the technical field of pile foundation engineering. The protective sleeve is provided with at least two protective sleeve dents, and the protective sleeve dents are correspondingly consistent with the preformed pile hoop dents. After the precast piles are spliced to form the anti-corrosion layer, the sheet-shaped protective sleeve hoops the splicing positions of the upper and lower section piles in the circumferential direction to form the sleeve-shaped protective sleeve, the protective sleeve dent and the precast pile hoop dent are correspondingly clamped, and the protective sleeve is fixed relative to the edge. The anti-corrosion layer at the joint is not in direct contact with water and soil any more, and particularly friction damage of the soil layer to the anti-corrosion layer in the pile sinking process is prevented. According to the scheme, finished prefabricated parts are directly wrapped and p