The invention discloses a toughening and corrosion-resistant concrete additive. The toughening and corrosion-resistant concrete additive is characterized by being prepared from, by mass, 30-40% of mineral powder, 30-40% of silicon micropowder, 6-12% of polypropylene fiber, 6-12% of modified furan resin, 0.1-0.2% of a silane coupling agent, 0.1-0.2% of p-toluenesulfonic acid and 4-8% of sodium sulfate. The toughening and corrosion-resistant concrete additive has the advantages that through the synergistic action of the silicon micropowder, the polypropylene fiber and the furan resin, the toughness and corrosion resistance of concrete can be significantly improved, the raw materials are easy to obtain, the preparation process is simple, the construction is simple and convenient, the incorporation of thermosetting resin can reduce the dosage of a gel material, and the construction cost is reduced.