Abstract: When the trackless rubber-tyred vehicle of explosion-proof diesel engine runs in a long distance and large slope roadway, there are some problems such as insufficient uphill power, intensified exhaust emission, short downhill braking life, etc. Based on the condition of long distance and large slope of 2# auxiliary transportation roadway in bulianta coal mine in Shendong, the advantages and disadvantages of several improved auxiliary transportation schemes are compared, and a more feasible new type of stringing trackless rubber-tyred vehicle scheme is selected. The power of the vehicle is provided by overhead catenary. The transmission system, current collecting system and insulation system of the stringing trackless rubber-tyred vehicle are mainly studied in the text. Functional tests of the stringing rubber-tyred vehicle has been enforced on the ground. The vehicle has sufficient uphill power, and more safe and reliable downhill braking performance by the combination of electric braking and wheel braking. It realizes low noise and zero emission of the trackless rubber-tyred vehicle in stringing roadway, and solves the running problem of the vehicle on long distance and large slope effectively.