Double core armoured low smoke halogen-free optical cable, the cable comprises a double core optical brazing, metal band and sheath layer; Each core optical fiber is wrapped with a plastic sheath layer, and the metal tape is spirally wound around the two plastic sheath layers to form a spiral armored layer, and the sheath layer is wrapped around the spiral armored layer. The utility model uses a plastic sheath layer wrapped on the periphery of each core optical fiber. Because the plastic is soft and elastic, the peeling force of the optical cable is controlled in a certain range and the peeling performance of the optical cable is improved. With the method of spiral sheathed the metal belt spiral winding outside the plastic tight set of layer, not only to ensure the bending properties of the fiber optic cable, high side pressure performance, enhance fiber twisting function, prevent external damage to cable damage, but also to ensure the stretching, flattening, impact, bending and torsion cases such as optical fiber transmission performance, meet the using demand of the optical fiber high side pressure, The application range of the optical cable is enlarged.