Modified calcium carbonate good in flame retardant effect and preparing method of modified calcium carbonate

The invention discloses modified calcium carbonate good in flame retardant effect and a preparing method of the modified calcium carbonate. 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 fumed silica, 2-3 parts of organic bentonite, 2-3 parts of magnesium stearate, 2-3 parts of asbestos fiber, 2-4 parts of antimonous oxide and a proper amount of deionized water. Due to the fact that zinc stearate, the asbestos fiber and the antimonous oxide are added, the effects that the calcium carbonate is not likely to stick to a mold and is good in self-lubrication property are enhanced when the calcium carbonate serves as packing, the calcium carbonate is not likely to burn, and the flame retardant performance of a product is improved. The prepared calcium carbonate powder is good in dispersity, not prone to aggregating or settling, good in comprehensive performance, good in applicability when serving as paint, plastic, pigments and other packing and worthy of popularization.