Biofeedback therapy instrument uses biofeedback technology to transform spontaneous weak electromyographic signals, which are not felt by patients under normal circumstances, into visually visible electromyographic signals (digital and graphic), so that patients can learn to consciously control muscle movements, and combine with electrical stimulation to help patients complete training movements. It can be used for rehabilitation of motor dysfunction caused by central nervous system pathology and pelvic floor muscle dysfunction (e.g. urinary/bowel incontinence, constipation, vaginal laxity, etc.).