The invention relates to PVC heat stabilizer, in particular to heat stabilizer applied to decoration of PVC materials, a preparation method and application thereof. The 
barium-
zinc liquid stabilizer is prepared from the following components in percentage by weight:, 20.0 to 35.0 percent of 
sodium iso-octoate, 10.0 to 15.5 percent of 
oleic acid, 8.5 to 12.8 percent of 
barium monohydrate, 1.0 to 5.0 percent of 
zinc oxide, 5.0 to 10.5 percent of diethylene glycolmonobutylether, 1.0 to 3.0 percent of 
antioxidant 1010, 1.0 to 4.5 percent of 
bisphenol A, 1.0 to 3.0 percent of beta-
diketone, 5.0 to 10.5 percent of anti-separation agent, and 20.0 to 35.0 percent of DOP, wherein the total amount of components is 100 percent. The invention solves the problem that products have foreign smell based on raw materials, simplifies the production process by a one-step synthesis method, has more convenient operation, and has the effects that: firstly, the stabilizer saves 
energy consumption and reducing 
pollution; secondly, the stabilizer has high value 
advantage compared with international products with the same function and has better competitive force; and thirdly, the stabilizer belongs to green and environment-friendly product, and has strong 
vitality.