The invention discloses an interior wall coating. The interior wall coating comprises the following components in parts by weight: 100-300 parts of water, 160-240 parts of titanium dioxide, 60-90 parts of calcium carbonate powder, 3-6 parts of a dispersing agent, 2-5 parts of an antifoaming agent, 160-240 parts of an acrylic emulsion, 4-6 parts of ethyl alcohol, 3-7 parts of a fire retardant, 2-4 parts of an antiseptic and antibiotic agent and 1-3 parts of a plant extract. The interior wall coating is lower in cost, the preparation process is simple, the effects of insect expelling and disinfecting can be achieved by the plant extract, and the interior wall coating smells fresh; the interior wall coating does not contain toxic substances such as formaldehyde, benzene and ammonia, the zero emission of volatile toxic substances is achieved, the own advantages and the mutual synergistic flame retardant effect of inorganic fire retardants are played to the greatest extent by using all components in the fire retardants cooperatively, the flame retardant temperature of the coating can be improved, a good fire retardant effect can be achieved, all components in the antiseptic and antibiotic agent play a role cooperatively, and a better antiseptic effect can be achieved.