Abstract: Dragline stripping technology is an advanced open-pit mining method which integrates mining，transport and dumping.If the geological condition and the production status fit for the dragline，the dragline stripping system is better than other digging and transporting system.In view of the dragline stripping technology，and in the principle of aiming at the maximum production，the cut width is optimized.The width of a mining panel is closely related to the swing of the shovel during working.Based on this，the functional relationship between the cut width and the total working time is established.By the analysis of the function，the rational cut width is determined as the value from 40 to 60 m.At the same time，in order to obtain good effect of the throw blasting and with reference for domestic and abroad experience，the final cut width is selected as 40 m.

Key words: Dragline stripping system, Cut width, The swing of the shovel, The total working time