The invention provides fireproof wall paint. The fireproof wall paint comprises raw materials in parts by weight as follows: 30-40 parts of water, 0.5-1 part of a dispersing agent, 0.3-0.5 parts of a 
wetting agent, 0.5-1 part of a defoaming agent, 0.5-1 part of a 
preservative, 1-2 parts of an anti-freezing agent, 0.5-1 part of a scrubbing-resistant agent, 1-2 parts of 
quartz powder, 10-15 parts of modified talcum 
powder, 10-20 parts of 
titanium dioxide, 0.2 parts of a PH (potential of 
hydrogen) 
regulator, 1 part of a coalescing agent, 0.5-1 part of a thickening and flattening agent and 25-35 parts of a 
styrene-acrylic 
emulsion. The invention further provides a preparation method of the fireproof wall paint. The preparation method comprises steps as follows: the dispersing agent, the 
wetting agent, the defoaming agent, the 
preservative, the anti-freezing agent, the scrubbing-resistant agent, the 
quartz powder, the modified talcum powder and 
titanium dioxide are added to water sequentially and stirred uniformly at the stirring speed of 1,000 revolutions / min, the mixture is ground to reach the 
fineness of 25-35 mu m, the PH 
regulator, the coalescing agent, the thickening and flattening agent and the 
styrene-acrylic 
emulsion are added, the 
viscosity of the mixture is adjusted to 110 KU, the 
contrast ratio is 0.95, the PH value is 7-8, and a wall 
paint product is obtained. The wall paint has excellent stability.