The outdoor wearable biomechanical signal acquisition system can simultaneously collect plantar pressure, IMU, EMG, and laser ranging signals. The system is powered by a 3.7V lithium battery, and all data is stored on the onboard SD card, which can complete the function of signal acquisition without the need for a computer, which is convenient for outdoor wear experiments, and is very suitable for use in rehabilitation engineering-related research institutions. The device also integrates an optimized intelligent algorithm software interface, which can be transformed into a sensing and control unit for intelligent rehabilitation aids according to user needs.