The invention provides a high polymer heat-resistant polyvinyl chloride based on a multi-element rare earth heat stabilizer, the polyvinyl chloride includes high molecular weight polyethylene, trioctyl trimellitate, liquid barium zinc, a multi-element rare earth heat stabilizer and low Molecular polyethylene wax, wherein the preparation method of the multi-element rare earth heat stabilizer is: under an inert environment, add palladium chloride and triphenylphosphine into n-hexane, stir evenly, add 4-bromopropiophenone, and then drop three Phenyl lanthanum solution, continue to react after the dropwise addition, separate and purify to obtain the multi-element rare earth lanthanum palladium metal compound; add the multi-element rare earth lanthanum palladium metal compound into nitric acid and stir, and mix rapidly with the ethanol mixed solution of malic acid and salicylic acid, then drop Add sodium hydroxide aqueous solution, heat to react, vacuum filter, wash and dry to obtain multi-element rare earth heat stabilizer. The polyvinyl chloride prepared by the invention has a high degree of polymerization, good synergistic effect among various components, and can remarkably improve the heat resistance, mechanical properties, corrosion resistance and other properties of the polyvinyl chloride material.