An automatic double spiral wire rope ranging device was designed to resolve the problems of wire rope disorder and extrusion when the mountain orchard traction double-track cargo vehicle was used in the curved track. Based on the analysis of the design requirement, the basic components and the operational principle of this device, the structure parameters of the chain transmission, the slide steering curve, and the guide fork of this wire ranging device was analyzed in this paper. Several synthetic wire rope ranging tests about this device were carried out after analyzing the force of the ranging rope wheel. The experimental results indicated that, in average，the wire rope ranging coefficient of original driving device was increased by 22.6% within the 16 m wire rope after installing the wire rope ranging device. Meanwhile, the power consumption increased by 0.026 kW·h in average and the driving device vibration noise was reduced by 0.75%. This wire rope ranging device has the advantages of ranging wire rope, low power consumption and reducing the driving device vibration noise. 