The invention provides a motor function restoration detector so as to improve the processing precision of motor function restoration signals and reduce noise mixed in the motor function restoration signals. The detector comprises a control unit, a motor function training and detecting unit and a signal storage and processing unit, wherein the control unit is used for controlling the motor function training and detecting unit to assist the human body with function training and detection of the motor function restoration signals; the signal storage and processing unit is used for storing the human body motor function restoration signals, which are converted into the digital signal format and output by the motor function training and detecting unit, for analysis and reference. The motor function restoration detector can avoid aliasing and interference of excitation signals with electromyographic signals, greatly overcomes the defect that the existing motor function restoration condition mainly relies on artificial judgement and overcomes the defect that processing of interference and aliasing by existing detecting equipment cannot meet requirements.