Special flexible texture coating for external heat insulating wall, and preparation method thereof

The invention discloses a special flexible texture coating for an external heat insulating wall. The coating is characterized by: 1) mixing water, an antimildew agent, a preservative, a dispersing agent, a wetting agent, a antifoaming agent, titanium pigment and calcium carbonate according to a mass ratio, followed by carrying out high speed dispersion to provide a spare use; 2) then mixing an emulsion, quartz sand and the antifoaming agent according to a mass ratio, followed by being added to the prepared mixed solution from the step 1), then carrying out medium-speed stirring; 3) mixing cellulose and the water according to a mass ratio, and carrying out stirring to prepare a mixed material of the cellulose to provide a spare use; 4) adding the mixture prepared through medium-speed stirring to the mixed material of the cellulose to carry out stirring, such that the mixed material of the cellulose can provide uniform thickening effect; 5) carrying out a color treatment for the finished product from the step 4). The coating provided by the present invention has characteristics of free of crack, high cohesional strength, effective prevention from coating deterioration, good water resistance, excellent penetration resistance, excellent flexibility. With the coating provided by the present invention, the fine cracks can be filled so as to prolong a service life of the external heat insulating wall and effectively protect buildings.