The invention discloses a low-friction, low-smoke, halogen-free flame-retardant sheathing material suitable for air-blown optical cable laying and a preparation method thereof. The sheathing material is composed of the following parts by weight of raw materials: 100 parts of matrix resin, composite filler type flame-retardant 100-150 parts of compound lubricant, 5-15 parts of nano-scale hydrotalcite, 1-2 parts of silane coupling agent, 1-4 parts of compound lubricant, 0.2-0.8 part of compound antioxidant, after mixing, extrusion, In the steps of granulation, cooling, screening and packaging, in the present invention, the friction coefficient of the sheath material obtained through careful formulation selection and processing is as low as 0.1 or less, the extrusion speed is fast, and the rejection rate is low, which is especially suitable for pipelines. In the construction of laying multiple optical cables by air blowing, because of the combination of hydrotalcite and various lubricants, it breaks through the common low-smoke halogen-free flame retardant sheath material due to a large amount of aluminum hydroxide and magnesium hydroxide. 0.25 or more will affect the air-blown laying of the optical cable.