A repeatedly written soft base material is a heat-proof aluminum foil paper that can be rolled as a cylinder and comprises a white writing layer preprocessed and coated on the base material in a powder coating manner, and a repeatedly adhesive layer or a double sided tape disposed on another side of the base material. The powder coating method includes adding few fiberglass and CaCO3 into solvent resistance paints to compound powder paints, and then coating the powder paints onto one side of the base material by using static electricity theory, finally baking the base material at 200 degree temperature. Besides, a release paper can be adhered on a surface of the adhesive layer of the base material.