Through the field test of a new type of waterborne inorganic permeable waterproof agent made in China at two leakage points in a subway station of Guangfo Ring Line, the test results show that adding this type of waterproofing agent to the cement-based filling material has a good effect on repairing the leakage of the structure. the white crystal produced by it can improve the strength and self-repair of seepage cracks in the repair area. At the same time, through the indoor control test, it shows that it can effectively improve the anti-permeability, anti-carbonation, anti-chloride penetration and early crack resistance of concrete. The comprehensive performance of the new waterproofing agent is ahead of the same type of products at home and abroad, and has high engineering application value.