Antimony-free flame-retardant polyvinyl chloride cable material and preparation method thereof

The invention discloses an antimony-free flame-retardant polyvinyl chloride cable material and a preparation method thereof. The cable material contains polyvinyl chloride, calcium carbonate, a flame retardant agent, a plasticizer, a stabilizer, a lubricant and the like; the raw materials are subjected to mixed granulation in a proper weight ratio, and the preparation method comprises the following preparation flow: firstly, carrying out high-speed mixing of the raw materials for 10-15 minutes in a high-speed mixer, then carrying out internal mixing plasticizing in an internal mixer, carrying out single-screw extrusion, carrying out hot grain-sized dicing, carrying out vibration screening, carrying out windy cooling, and packaging. The cable material prepared by the formula and the method has the efficiencies of convenient manufacturing, stable quality, high production efficiency and the like.