The invention relates to a watery acrylic acid insulating mould coating comprising the following components with the parts by weight:10-40 of acrylic acid latex, 12-20 of composite ceramic microballon, 5-15 of fillers, 1-15 of pigment, 0.1-1 of accessory ingredient and 15-35 of water. The watery acrylic acid insulating mould coating takes the watery acrylic acid latex as a carrier and contains a large amount of composite ceramic microballon, thereby enhancing the friction resistance and scrub resistance; a coating film generated by the watery acrylic acid latex has the capacities of heat insulation, heat preservation, water prevention, corrosion resistance and sun protection, thereby the watery acrylic acid insulating mould coating can be widely used for metal roofing materials, building materials, pipeline materials, and the like and can effectively reduce the electricity consumption and enhance the comfort level of work and environment. Besides, the watery acrylic acid insulating mould coating has the advantages of good heat insulation and preservation effects, innocuity, environmental protection, simple construction (the same as the construction technology of common water paint), friction resistance, acid-alkali resistance, water resistance, weather resistance, good dirt resistance, high cohering degree, powerful scrub resistance function and longer service life.