A polyvinyl chloride insulating power cable disclosed by the utility model comprises a cable core which is formed by twisting a plurality of insulating wire cores and a reinforcing core located in the center defined by the insulating wire cores, and a filling layer is arranged at the gaps of the cable core. A foaming liner layer is arranged on the outside of the cable core, a metal armored layer is extruded on the outside of the foaming liner layer, and an outer sheath is extruded on the outermost layer of the cable core. Each insulating wire core is composed of a conductor and an insulating layer extruded on the outside of the conductor, and the insulating layer is composed of four layers of polyvinyl chloride insulating materials of which the materials are same but the thicknesses are different. The polyvinyl chloride insulating power cable of the utility model has the characteristics of very strong tensile strength, good flame retardant property, safety performance, shielding performance and anti-interference performance, long service life, etc.