This case report was a 39-year-old female patient who accidentally fell and caused a fracture of the left patella. After receiving orthopedic surgery and internal fixation, the left knee joint was stiff and could only bend about 10 degrees. The improvement was limited after receiving general rehabilitation treatment. Switch to Chinese medicine treatment. Chinese medicine gives oral Guilu Erxian Capsules (500mg) 8 capsules a day, and acupuncture at acupoints near the left knee. The following acupoints are selected according to the condition of the day: Xuehai (SP10), Liangqiu (ST34), Zusanli (ST36), Yanglingquan (GB34), Yinlingquan (SP09), Weiyang (BL39), Yingu (KI10), Heyang (BL55), Fuxi (BL38), Xiguan (LV07), Ququan (LV08). After receiving 9 acupuncture treatments and medications for about 1 month, the movement of the left knee joint improved, the range of motion increased to 60 degrees, and the subjective pain and tightness of the affected area were also greatly improved. In the future, this case can be used to provide reference for the same treatment of similar diseases.