The utility model discloses a modified line hoisting winch rope supporting device which comprises tension springs, suspension steel wire ropes, supporting frames, bearing pedestals, a rope supporting roller and a support body. The support body is a main body supporting piece and is integrally of a frame structure. The two ends of the support body are provided with the supporting frames with vertical inner walls. The bearing pedestals are arranged on the lower portions of the vertical walls on the inner sides of the supporting frames, the rope supporting roller with the encapsulated outer surface is arranged between the two bearing pedestals, the suspension steel wire ropes are connected to the upper ends of the supporting frames, the tension springs are connected to the upper end portions of the suspension steel wire ropes, and hooks are connected to the upper ends of the tension springs. The modified line hoisting winch rope supporting device is simple in integrated structure, convenient to operate and use, good in stability and high in reliability. According to the modified line hoisting winch rope supporting device, due to the fact that the surface of the roller is encapsulated, the suspension steel wire ropes are protected against direct friction of the roller; due to the roller structure, the rollability of the rope supporting device can be improved, and the phenomenon that rope supporting force is concentrated is eliminated.