According to ABS algorithm and signal processing method, duty cycle of wheel speed signal that exceeding the limit of standard scope& 30%-70% impacting the accuracy and stability of ABS was analysed. 根据ABS算法和信号处理方式,分析了轮速信号占空比超出30%-70%的正常范围时,对ABS控制精确性和稳定性能的影响。