The common peroneal nerve is a branch of the sciatic nerve and is located lateral to the sciatic nerve in the hip, while in the knee the common peroneal nerve traverses the back of the tendon of the lateral head of the gastrocnemius muscle, which is mostly adjacent to the lateral head of the gastrocnemius seed bone and is relatively superficial and easily damaged. Symptoms: Early on, there is only a soreness and numbness in the lateral calf, which is obvious after walking and fatigue and cold! Gradually, weakness of the calf, decreased skin sensation of the lateral calf and dorsum of the foot, weakness of ankle dorsiflexion and foot valgus. The strength of the anterior tibial muscles, bunions, and peroneus longus muscles decreases to varying degrees, and in severe cases, it may manifest as horseshoe foot deformity and walking across the threshold gait. Electromyography may reveal varying degrees of damage and slowed conduction of the common peroneal nerve. 1, early surgical treatment: including incision of peroneal canal decompression, complete release of perineal tissues, if the outer membrane of the nerve is heavily adhered to the surrounding tissues, then the outer membrane of the nerve will be released. 2.Non-surgical treatment: including electric acupuncture, neuromuscular therapy instrument treatment, Chinese herbal medicine external washing, physiotherapy, massage. Drug treatment: oral vitamin B1, B2, dibazol, non-steroidal anti-inflammatory analgesic treatment. Electro-acupuncture points: Guizhong, Yanglingquan, and foot Sanli. External cleansing formula: 25g each of Qian Qian Jian, Hai Tong Pi, Hai Feng Vine, 15g each of Luo Shi Vine, Lu Lu Tong, Xian Zi Cao, 12g each of Niu Knee, Fang Feng, Gui Zhi, and ice chips, put the medicine into a pot with 500ml of water, boil for 10 minutes and then add 50g each of white wine and vinegar, and use to fumigate the knee joint of the affected limb, the peroneal nerve below the small head of the fibula, twice a day & 40-60 minutes each time. 40-60 minutes each time. 3.Late foot drop orthopedic: A combination of modified posterior tibialis anterior and [long extensor posterior (Jones procedure) was used to treat late common peroneal nerve injury. After surgery, the affected foot was fixed in 80 degrees of dorsiflexion and mild valgus position with the former posterior cast clip. 5 weeks later, the cast was removed and the clincher and wire were removed, and the weight-bearing functional exercises were gradually performed. 8 weeks after surgery, the foot was abandoned to walk with the crutches.