The invention relates to a 8-shaped photoelectric composite flame-retardant cable which comprises a power cable and an optical cable. A lead and a filling rope are arranged in a cable core of the power cable, a conductor of the lead and the filling rope is covered by an insulating layer, and is formed by a plurality of strands of tinned copper wires, and the cable core of the power cable is sequentially covered by a heat insulating layer, a copper wire braid shielding layer and an external protection sheath. Optical fiber and a tension reinforcing element both covered by a casing pipe are arranged in the cable core of the optical cable, and the cable core of the optical cable is covered by an external protection sheath. The external protection sheath of the power cable and the external protection sheath of the optical cable are connected to form a 8 shape, and a connection hanging strip is arranged between the two external protection sheaths. The invention is applied to the conditionsof needing both power transmission and optical signal transmission, can achieve the purpose by only laying one cable without secondary laying, thereby reducing the laying cost, reducing the construction intensity, having ordered cable distribution and being convenient to locate faults.