The invention discloses a power cable bender and a using method. The power cable bender mainly comprises a support plate A and a support plate B, wherein an angle adjustment device is arranged on thesupport plate A; the angle adjustment device comprises a driving wheel and a cable support plate; an abnormal wheel matched with an abnormal rotating wheel is arranged in the middle of a cable bendingwheel; and an operating handle is arranged on the other side of the abnormal rotating wheel; a ratchet and a pawl structure are arranged on the support plate B; a cable fixing device is arranged on an outer circle of the ratchet; a pawl fixing circular disc is arranged in the middle of the ratchet; and the other side of the pawl fixing circular disc is connected with an operating handle. The support plate A and the support plate B can be folded for storage, so that a space is saved. The power cable bender is equipped with a fixed rack, and the fixed rack is used in need of cable wire with comparatively large bending cross section diameter. According to the power cable bender and the using method disclosed by the invention, bending of any one section of a cable of any length can be realized; and the cable fixing device is arranged, so that dropping of the cable wire is prevented, and the applicable cable is wide in diameter ranges, and both of a manual operation and an external force operation also can be carried out, so that the flexibility is strong.