The invention discloses a flame-retardant and high-temperature resistant composite cable. The composite cable includes an insulating outer skin, a through hole is formed in the top part of the insulating outer skin, a vertically arranged adjusting rod is installed inside the through hole in a rotating mode, a horizontally arranged rotating handle is fixedly installed on the top part of the adjusting rod, a placing groove is formed in the inner wall of the bottom of the insulating outer skin, a bearing is fixedly installed in the placing groove, the bearing is fixedly connected with the bottomof the adjusting rod, the bearing is arranged on the adjusting rod in a sleeving mode, a horizontally arranged spacing plate is arranged inside the insulating outer skin, the through hole is formed inthe spacing plate, the spacing plate is arranged on the adjusting rod through the through hole in a sleeving mode, and horizontally arranged first sliding blocks are installed on two ends of the spacing plate in a sliding mode. According to the flame-retardant and high-temperature resistant composite cable, the separation of internal wires of the cable is achieved, the separated areas can be adjusted and are suitable for placing various wires, it is convenient to distinguish each wire when the cable is connected and repaired, the interior of cable is not required to be filled with other materials to separate the wires, and the cost of the cable is saved.