The invention relates to a low-carbon 
humidity controlling functional 
coating which comprises component A, component B and component C in parts by weight, wherein the component A comprises a 
thickening agent, a dispersing agent, a defoaming agent, a 
solvent, a bactericide, a 
wetting agent and water; the component B comprises 
powder, 
titanium white, kaolin and heavy 
calcium carbonate powder; and the component C comprises an 
emulsion, a defoaming agent and a 
film forming agent. Compared with the traditional inside wall 
emulsion coatings, the 
coating has the advantages that hydrophilic porous inorganic minerals are added to ensure that a 
coating film has excellent 
pollution resistance; after an ordinary coating film absorbs 40g of water in per 
square meter, the coating film reaches a saturation state, and most part on the surface of the coating film has a 
dew formation phenomenon, however, after one 
square meter of the 
humidity controlling coating film absorbs 60g of water, the surface of the film has no 
dew formation phenomenon; when the indoor 
humidity is too high, the porous structure of the film can automatically absorb water in the air and stores the water, and when the room is dry, the water in the film can be released so as to automatically regulate the indoor humidity; and due to the porous structure, the film also has the functions of absorbing sound, insulating heat and deodorizing.