The present invention provides a hydrotalcite-tin maleate composite environmental protection stabilizer for PVC, wherein the hydrotalcite-tin maleate composite environmental protection stabilizer is prepared from the following raw materials by weight: 20-30 parts of modified magnesium aluminum hydrotalcite, 10-12 parts of tin maleate, 6-9 parts of lanthanum salicylate, 1-3 parts of triethyl phosphite, 3-6 parts of barium stearate, 2-4 parts of epoxidized soybean oil, 10-13 parts of poly(1,2-propylene glycol adipate), 2-3 parts of beta-diketone, 5-6 parts of isomaltitol, 2-3 parts of 2,4,6-tris(2'n-butoxyphenyl)-1,3,5-triazine, 1-3 parts of oxidized polyethylene wax, and 10-12 parts of celestine powder. According to the present invention, the PVC stabilizer has characteristics of good thermal stability, good processing performance, environmental protection, no toxicity, low cost, good plasticity and balance torque reducing during the PVC processing process, and low cost.