The hand is a motor organ and is most vulnerable to trauma in life and labor. The dysfunction after hand trauma is the motor and sensory impairment caused by scar contracture, tendon adhesion, swelling, joint stiffness, muscle atrophy, tissue deficiency, long-term wound non-healing, etc. The early intervention of rehabilitation therapy has significantly improved the surgical effect and functional recovery of hand trauma patients and achieved certain economic and social benefits. 1, internal hand muscle exercises: the use of leather ball and rubber band exercises, can be trained on the finger flexors and extensors, but also on all the internal hand muscle training, exercises, as hard as possible to pinch the leather ball or pick rubber band net, maintain 10 seconds, repeat 10 times for a group of exercises, each training 5 to 10 groups. 2, to maintain joint mobility exercises: coarse to finger exercise: the treatment clay pinched into a cone shape glued to the plane, the thumb of the finger into the treatment clay, so that the fingers in the cone close. Gross finger flexion exercise: Place the therapeutic clay in the palm of your hand, flex your fingers into a fist, and squeeze the clay with force. Individual split-finger flexion exercise. Individual split-finger-to-finger exercise. Finger abduction exercise: Place the therapeutic mud ring between the proximal and distal interphalangeal joints and stretch the fingers apart from the mud ring. Rough finger extension exercise: Place the finger and thumb in the opposite finger position, place the clay ring between the metacarpophalangeal joint and the proximal interphalangeal joint, and extend the finger outward (extension and abduction). Press the therapeutic mud flat plate on the table, keeping the fingers extended and pressing the therapeutic mud thinly. Keeping the fingers in the extended position, knead the clay into a single roll. Finger induction exercise: Place a piece of clay between two fingers and bring the fingers together. Thumb flexion and extension exercise: Make a cylinder of the clay and place it on a flat surface with the hand in the middle position, press the thumb deeply into the cylinder and take it out. Note Exercises to maintain joint mobility are widely used in diseases that can cause joint contracture and stiffness. For example: after fracture fixation, after joint dislocation reset, after tendon repair, arthritis, etc., the above method can be used to exercise. Contraindications: severe injury (3-4 days); 3 weeks after nerve and tendon injury repair; acute arthritis; unstable fracture; patients who need strict braking after surgery.