The invention discloses an aqueous blackboard paint which solves the problem of 
solvent release of existing 
solvent type blackboard paints. The aqueous blackboard paint comprises the following components in parts by 
mass: 260 parts of water, 1 part of dispersant, 1.5 parts of a 
wetting agent, 200 parts of 
emulsion, 1 part of a 
defoamer, 200 parts of 
pigment, 120 parts of filler, 15 parts of coalescing agents and 3 parts of thickener. The preparation method comprises the following steps of: during preparation, adding water into a reaction kettle, adding the 
wetting agent, the dispersant and the 
defoamer at 100-300 r / m, and stirring for 30-40 minutes; adding the 
pigment and filler under stirring, and dispersing for 1-1.5 hours at 500-800 r / m; then, adding the 
emulsion, and stirring for 30 minutes at 800-1000 r / min; pumping the materials to a 
grinding miller, and 
grinding the materials till the 
fineness is below 45 microns; and pumping the grinded materials to a proportioning kettle, adding the coalescing agents, the 
defoamer and the thickener, and adjusting the 
viscosity to 
discharge and 
package so as to obtain a finished product. According to the paint provided by the invention, various film forming matters in different performances are adopted to compound and modify, so that demands of the blackboard paint such as high 
hardness, scrubbing resistance, 
wear resistance and color residual prevention are satisfied.