The invention provides a flood prevention season causeway treatment method. The method comprises the following steps that S11, the piping scale of a causeway is judged; and S12, according to the piping scale, the flood prevention season causeway is treated by selecting corresponding piping treatment methods, the piping treatment methods comprise a reversed filter trunk method and reversed filter gland methods, and the reversed filter gland methods comprise the sand-gravel reversed filter gland method and the geotextile reversed filter gland method. According to the flood prevention season causeway treatment method provided by the embodiment of the invention, by judging the piping scale of the causeway, different flood season causeway treatment methods are adopted, when the piping number islower than or equal to a preset threshold value or a piping group which can be treated in a zoned mode is formed through piping, the sand-gravel reversed filter trunk method is adopted; when the piping number greatly exceeds the preset threshold value or the piping is grouped, the reversed filter gland methods including the sand-gravel reversed filter gland method and the geotextile reversed filter gland method can be adopted, the risks are controlled in a targeted mode, resources are reasonably used, and the risks are handled scientifically and efficiently.