Abstract: In order to meet the technical specifications of subway design, and considering the special requirements of cable size, softness, moisture resistance and weather resistance in special installation and construction environment of subway engineering, the cable material and cable structure were studied comprehensively. The flame retardant class B₁ flexible control cbble was developed, its insulation was double-layer co-extruded structure: the inner layer was ceramic silicone rubber, the outer layer was high strength flame retardant silicone rubber, the insulating wire core was wrapped with flame retardant tape after cabling, the sheath was flame retardant low smoke halogen-free polyolefin or flame retardant high strength silicone rubber. The combustion performance of the cable was in line with the class B₁ of GB 31247—2014, and the cable combustion drops, gas toxicity and corrosion reached respectively the indexes d₀, t₀ and a₁ specified in this standard. The cable was not wrapped mica tape, but still had the characteristics of short circuit without combustion, combustion without short circuit.