The invention discloses a cross-linked polyethylene insulated low-smoke halogen-free flame-retardant power cable special for rail transit. The power cable comprises a conductor, and a conductor shielding layer, an insulating layer, an insulating shielding layer, a metal shielding layer, a water blocking layer, an aluminum-plastic composite belt, an inner protective layer, a steel wire armor layerand an outer protective layer are sequentially wrapped on the outer side of the conductor. By arranging a skin prying plate and rolling wheels, one end of the outer protective layer is clamped and fixed through one-way rotation of the rolling wheels, the outer protective layer is torn and separated in the cutting process, the outer protective layer cannot be broken in the tearing and separating process, and collection and cleaning are easy; an adjusting sliding block and a threaded rod are arranged; the threaded rod is used for adjusting the adjusting sliding block; the adjusting sliding blockmoves in the adjusting sliding groove which is obliquely formed, then the cutting depth of the cutting blade is controlled, it is avoided that due to the fact that a notch is too shallow, the outer protective layer is inconvenient to strip or the internal structure of a cable is damaged due to the fact that the notch is too deep, the stripping time of the outer protective layer of the cable is greatly saved, and meanwhile the risk that workers are injured is reduced.