Nano penetrating waterproofing agent is a colorless, odorless, non-toxic and non-flammable environmentally friendly chemical penetrating waterproofing agent, which is suitable for all concrete buildings. Nano permeable waterproofing agent is a water-based product, after spraying on the surface of concrete, it will penetrate into the concrete 5-15mm inside and produce a chemical reaction with the free alkali in the concrete to generate a stable branch-like crystal substance, effectively plugging the pores of the concrete, forming an effective waterproof layer inside the concrete, and enhancing the hardness of the concrete while waterproofing, and prolonging the life of the concrete.