Water-based radon-proof interior wall coating

The invention discloses a water-based radon-proof interior wall coating, which consists of a component A and a component B. The component A comprises 12 to 20 mass parts of water, 20 to 25 mass parts of pigment, 50 to 60 mass parts of water-based epoxy resin emulsion and 0 to 2 mass parts of water-based color paste; and the component B comprises 20 to 30 mass parts of water-based curing agent, 50 to 60 mass parts of filler and 15 to 25 mass parts of water. The water-based radon-proof interior wall coating can form a dense physical paint film. The paint film has high radioresistance, and can effectively avoid the harm of radon in the wall to human bodies. The coating has the advantages of scrub resistance and stain resistance. Various colors of the coatings can be obtained by adding different color paste and adjusting the using amount of raw materials; and decorative effects such as highlighting, mercerizing, mattifying and the like can be obtained as required to meet different requirements of interior decoration. The coating can be stably stored for a long time so as to reduce the influence of transportation and storage on product quality and ensure the reliability of the product quality.