本文利用7T08信号处理仪对健康人的腕伸肌和腕屈肌在指伸、指屈、腕伸、腕屈、旋前,旋后六个动作下所发出的肌电信号一一作了频谱分析。并根据频谱图提出了利用两对电极,从两块肌肉上取出两组电信号来控制三自由度前臂假手的方案。具体电路在健康人身上作的试验表明从频率分离来研制肌电假手是可行的。 In this paper, 7T08 signal processor for healthy people’s wrist extensor and flexor flexor muscle in the finger extension, finger flexion, wrist extension, wrist flexion, pronation, supination after the six movements under the EMG signal made a spectrum analysis. According to the spectrogram, a scheme of using two pairs of electrodes to remove two sets of electrical signals from two muscles to control three degrees of freedom forearm artificial hand was proposed. Specific circuit tests conducted on healthy people show that it is feasible to develop artificial myoelectric prostheses from the frequency separation.