The invention relates to a switching method and a switching 
system for steel 
wire rope in automobile 
crash test traction equipment; the switching method comprises the steps: 
cutting off an old steel 
wire rope at an initial position, enabling the rear end of the 
cut-off old steel 
wire rope to be connected with a moving device, and enabling the front end to be connected with the free end of a new steel wire 
rope; driving, by the moving device, the rear end to move towards the end point of the underground rail, meanwhile, driving, by the front end, the new steel wire 
rope to enter the underground rail, when the moving device moves to the end point of the underground rail, 
cutting off the old steel wire 
rope again at the initial position to obtain a 
cut-off part and the rear end, and returning the moving device to the initial position and connects the rear end to the moving device; repeating the steps until the front end is taken out of the underground rail, completely 
cutting off the old steel wire rope, cutting off the new steel wire rope, and then inserting the two ends of the new steel wire rope together. The method adopts the mode that the old steel wire rope drives the new steel wire rope to enter the rail, finally completes change-over, can ensure that the new steel wire rope completely enters the rail without errors, and is convenient and accurate to change and low in cost.