The invention discloses a calcium chloride polyolefin composite material as well as a preparation method thereof, belonging to the chemical technical field. The calcium chloride polyolefin composite material is prepared from the following materials in percent by mass: 45%-48% of anhydrous calcium chloride, 42%-45% of polyethylene, 2%-3% of an aluminate coupling agent, 0.5%-0.8% of stearic acid, 0.3%-0.5% of calcium stearate, 2%-3% of paraffin, 1%-2% of PE (Polyethylene) wax and 0.5%-0.8% of an antioxidant. The calcium chloride polyolefin composite material disclosed by the invention has the beneficial effects that odor-removing function as well as strength optimization are greatly improved, heat resistance and aging resistance of the materials are increased, and the calcium chloride polyolefin composite material is a modified high polymer material which is truly green, environment-friendly, low-carbon, multifunctional and low in price.