The invention relates to a multifunctional inorganic interior wall 
coating and a preparation method thereof. The 
coating comprises the following components in percentage by weight: 5-15 percent of 
potassium silicate, 2-5 percent of 
lithium silicate, 5-20 percent of silica 
sol, 5-15 percent of diatomite, 5-10 percent of shell 
powder, 5-15 percent of photosensitive auxiliary-supported 
tourmaline, 5-15 percent of 
radiation-resistant-bactericidal auxiliary-supported 
bentonite, 1-10 percent of nano SiO2 dispersing liquid, 2-8 percent of calcined kaolin, 3-12 percent of 
anatase titanium dioxide, 2-8 percent of 
alumina powder and 10-25 percent of water; the total percentage by weight of all the components is 100 percent. The preparation method provided by the invention is simple; the obtained interior wall 
coating has the advantages of being non-toxic, odorless, green and environment-friendly, 
radiation-resistant, bactericidal and bacteriostatic, capable of eliminating 
formaldehyde and other organic pollutants, self-clean, capable of purifying air, releasing negative 
oxygen ions and regulating the 
humidity, fire-proof and 
flame-retardant, high temperature-resistant, water-resistant, scrubbing-resistant, aging-resistant, powdering-resistant and 
corrosion-resistant, thereby having wide market prospect.