Traction for lumbar synostosis should pay attention to time, strength, symptomatic changes and exclusion of contraindications. 1. Time: the general traction time is about 10~35 minutes, which can be adjusted according to different tolerance level, there is no fixed standard, but we should pay attention to avoid too long time. 2. Strength: usually take about 1/4 of the weight of the mass to take traction, avoid too much or too little strength, otherwise it may cause accidental injuries or fail to achieve the effect of traction. 3. Symptomatic changes: pay close attention to their own symptoms in the traction process, if there is obvious pain aggravation must be promptly informed to the doctor, immediately stop traction. 4. Excluding contraindications: including lumbar disc herniation accompanied by slipped discs, numbness in the saddle area, poor cardiorespiratory function, the presence of cardiac disease, pregnancy and so on. It is recommended that the patient consult a regular hospital in time and follow the doctor’s instructions for treatment.