Method for increasing retention rate of calcium carbonate in paper-making reconstituted tobacco

The invention relates to a method for increasing a retention rate of calcium carbonate in paper-making reconstituted tobacco. The method comprises the steps that the calcium carbonate is added into a tobacco stem sizing agent with a certain beating degree to enable the calcium carbonate and the tobacco stem sizing agent to be fully adsorbed to form a compound; the compound is wrapped by cationic starch to form a larger flocculation body; modification and stability treatment are performed on the surface of the flocculation body by a surfactant and a cross-linking agent respectively; the modified calcium carbonate and a tobacco sizing agent are mixed with the help of a multi-element composite retention and drainage system and then processed into the reconstituted tobacco through papermaking, squeezing, coating, drying and slitting. By means of the method for increasing the retention rate of the calcium carbonate in the paper-making reconstituted tobacco, the binding force of the modified calcium carbonate and the sizing agent is enhanced, the modified calcium carbonate and the sizing agent are not likely to run off, and the retention rate of the modified calcium carbonate in the reconstituted tobacco is high.