Modified calcium carbonate having good water-repellent oleophilic moisture-proof effects and preparation method thereof

The invention discloses modified calcium carbonate having good water-repellent oleophilic moisture-proof effects and a preparation method thereof. The modified calcium carbonate is characterized by being prepared from, by weight, 100-150 parts of calcium carbonate, 30-50 parts of sodium oleate, 0.3-0.7 part of sodium dodecyl benzene sulfonate, 1-3 parts of sodium bicarbonate, 4-8 parts of styrene, 0.02-0.05 part of potassium persulfate, 3-5 parts of gas phase silica, 2-3 parts of organic bentonite, 1-2 parts of homo-polypropylene, 2-4 parts of nano iron slag, 1-2 parts of palmitic acid isopropyl ester and an appropriate amount of deionized water. The added nano iron slag, the added homo-polypropylene and the added palmitic acid isopropyl ester produce mutual effects to enable calcium carbonate powder to have good water-repellent, oleophilic, moisture-proof, mechanical and impact-resisting characteristics, and the modified calcium carbonate has very good strengthening effect when serving as a packing, improves the quality of a product and is wide in application field and worthy of popularization.