Self-closing polymer cement waterproof paint and method for preparing same

The invention discloses a self-closing polymer cement waterproof paint. The paint consists of a liquid material component and a powdery material component, wherein the liquid material component comprises the following components in percentage by weight: 85 to 93 percent of high molecular emulsion, 1.5 to 3 percent of plasticizer, 0.1 to 0.4 percent of dispersing agent, 0.1 to 0.3 percent of accelerant, 0.2 to 0.4 percent of antiseptic, 0.2 to 0.4 percent of antifoaming agent, 0.5 to 1.3 percent of pre-dispersed solution of nano silicon dioxide, 0.15 to 0.35 percent of pre-dispersed solution of nano aluminum oxide and the balance of water; and the weight ratio of the liquid material component to the powdery material component is 10:7-12. A new self-closing polymer cement waterproof paint is prepared by the invention; each indicator of the paint meets the national standard of GB/T 23445-2009; and the paint has high self-closing performance and fills the gap in China.