The utility model relates to a composite cable suitable for safety protection equipment. The cable comprises a sheath, a power line group, a communication line group, an air guide pipe and a safety rope group are arranged in the sheath, the power line group comprises a conductor, an insulating layer and a shielding layer are coaxially distributed on the conductor from inside to outside, the communication line group comprises a conductor, and an insulating layer and a shielding layer are coaxially distributed on the conductor from inside to outside. Therefore, a composite structure is adopted,various requirements of power supply, oxygen supply, signal transmission and the like are met, and complex wiring design is avoided. And the safety rope is embedded in the sheath and is matched with the sheath, so that dragging can be realized by utilizing machinery, and the use is convenient. The underwater water tightness using requirement is met, and the device can be widely applied to the fields of diving detection, urban sewage disposal, industrial sewage disposal, closed environment cleaning and detection and the like. The structure is simple and production and manufacturing are easy.