Aiming at realizing the type prosthetic movement control problem to use the principle of toe pressure signal recognition, the basic structure of a toe pressure signal recognition system was built, the basic principles of the toe pressure signal recognition system was introduced, the instruction and encoding method by the toes on the length of time were stated, the function of the toes on signal detection system was realized by using the PC application combined with MP150 guide more physiological recorder. Experimental results show that this method can be used to detect toe pressure signals at high accuracy and to extract the instruction code,the purpose of the accurate control prosthetic limbs movement is achieved.