The invention discloses a salix mongolica / polyvinyl chloride wood-plastic composite material and a production method thereof. The salix mongolica / polyvinyl chloride wood-plastic composite material comprises the following components in parts by mass: 100 parts of polyvinyl chloride, 40 parts-60 parts of salix mongolica wood powder, 2 parts-6 parts of coupling agent, 3 parts-5 parts of lead salt compound stabilizer, 0.3 part-0.7 part of calcium state, 0.1-0.3 part of stearic acid, 0.1-0.4 part of paraffin and 1 part-4 parts of chlorinated polyethylene. The production method of the salix mongolica / polyvinyl chloride wood-plastic composite material comprises the following steps of: (1), preparing the salix mongolica wood powder; (2), drying the raw materials; (3) weighing the raw materials according to proportions; (4) pretreating the salix mongolica wood powder; (5) stirring and heating; (6) extruding and pelleting; and (7) cutting, drying and packaging. The salix mongolica / polyvinyl chloride wood-plastic composite material has the advantages of corrosion resistance, moisture protection, easiness in processing, high strength, good durability, strong adjustability, wide source of raw materials, low cost and capability of reducing environmental pollution.