Radical breast cancer surgery requires removal of the breast, pectoralis major and minor muscles, axillary lymph nodes and connective tissue on the affected side. Due to the extensive resection, if functional exercise is not carried out in time after surgery, it will cause dysfunction of the affected upper limbs and affect the life and work of patients. Functional exercise after breast cancer surgery can be divided into three stages, namely, bed rest, bed activity and after discharge from hospital. After radical breast cancer surgery, in order to make the skin heal well and avoid fluid accumulation, a rubber drainage tube should be placed and wrapped with a chest band under pressure after surgery. After returning to the ward, the rubber drainage tube will be connected to the negative pressure suction device, so the patient will be bedridden for 1-3 days after surgery. During this period, the patient should mainly exercise the function of the hand, wrist and elbow joint. You can do exercises such as finger extension, fist clenching and wrist flexion and elbow flexion. 2.Functional exercise of bedtime activity The bedtime activity period is after the negative pressure suction tube under the flap is removed, and the patient starts to get out of bed until the time of discharge. As the scar tissue near the axillary incision is still forming, early exercise can restore the function of deltoid, trapezius and latissimus dorsi as soon as possible. This is an important part of the functional exercise of the upper limbs after radical breast cancer surgery. (1) 3-4 days after surgery, the patient can sit up and start flexing the elbow; (2) 5 days after surgery, the patient can practice palm touching the contralateral shoulder and ipsilateral ear after lifting the chest strap that fixes the upper limb; (3) 9-10 days after surgery, the incision sutures can be removed. At this time, the upper limb of the affected limb can be exercised to elevate the elbow joint of the affected side in flexion and place the palm of the hand on the contralateral shoulder. (4) 14 days after surgery, practice placing the palm of the affected side behind the neck, so that the affected side of the upper limb is gradually raised to the patient’s low head position from the beginning of the exercise to the head and chest position, and then to be able to cross the top of the head with the palm of the affected side and touch the contralateral ear. In order to expand the range of motion of the shoulder joint, you can also do wall-holding exercises to strengthen the function of raising the upper limb on the affected side. 3.Exercise of upper limb function after discharge Patients should continue to insist on the functional exercise of the affected limb after discharge from the hospital. The above exercises can be repeated, especially the exercise of raising the upper limb by holding the wall, which can gradually restore the range of motion of the upper limb and shoulder joint to normal. In order to further make the movements coordinated, natural and easy, the following functional exercises can also be performed; (1) upper limb rotation exercise. (2) Upper limb posterior extension exercise. The above exercises should be performed 1-3 times a day for 30 minutes each time. Pay attention to avoid excessive fatigue, should be gradual and appropriate to stop. For patients with special conditions, exercise time should be reduced or delayed as appropriate, but do not stop practicing.