The invention relates to the technical field of paint industry, in particular to an environment-friendly interior wall paint. It is prepared from the following raw materials by mass: 40-50 parts of calcined shell powder, 15-20 parts of light calcium carbonate, 20-25 parts of titanium dioxide, 15-20 parts of hydroxypropyl cellulose, 0.5-20 parts of alkaloid 1 part, 0.5-1 part of wetting agent, 10-15 parts of vegetable glue, 3-5 parts of chitosan, 0.5-1 part of nano titanium dioxide silver chelating agent. The environment-friendly interior wall coating of the present invention adopts natural shell powder as raw material, is made through grinding, high-temperature firing and special process, and has the function of absorbing and decomposing these harmful gases; the nano-titanium dioxide silver chelating agent has both the visible light of nano-titanium dioxide itself It has the functions of sterilization, anti-virus, and degradation of bacteria and organic matter under ultraviolet light, and has strong anti-bacterial and virus-killing effects of nano-silver without light source, and has the advantages of strong anti-bacterial ability, wide range, and long anti-bacterial time; plant glue Does not emit formaldehyde, benzene, ammonia and other harmful gases.