The driving wheel slip ratio calculation by using rear wheel speed as reference speed could lead to a calculation mistake and wrong intervention of traction control system when vehicle was cornering. The term of front wheel reference speed was introduced for calculating driving wheel slip ratio under cornering situation. The extraction method by using the yaw rate signal and the steering wheel angle compensation method by using the front wheel angle signal were introduced for calculating driving wheel slip ratio. Experimental results confirmed the effectiveness of these two algorithms, the former algorithm took 0.8 ms and the latter algorithm took 0.3 ms, and so the latter algorithm has been taken. Wrong intervention disappeared after the modification by the steering wheel angle compensation method.