To explore the clinic effectiveness between arthroscopy assisted percutaneous reconstruction of ankle lateral ligament complex and all-arthroscopic repair of anterior talofibular ligament for chronic lateral ankle instability. [Method] A total of 35 patients with chronic lateral ankle instability from December 2015 to January 2020 were enrolled in our study. Of them, 19 patients were treated with percutaneous reconstruction of ankle lateral ligament complex, while the other 16 patients were treated with all-arthroscopic repair of anterior talofibular ligament. The mean age, gender, mean time from injury to surgery between two groups were analyzed. We also compare the operation time, hemorrhage?during?operation, postoperative complication between two groups. AOFAS scores, VAS pain scores, Karlsson ankle function scores, anterior displacement of talus, tilt angle of talus, range of motion were evaluated before surgery, one and two years after surgery. [Results] The surgical time of ligament reconstruction group was longer than ligament repair group. There were 4 patients with postoperative fever in ligament reconstruction group, while only 1 in ligament repair group. Two patients in ligament repair group and one patient in ligament repair group have foot dorsum skin numbness after surgery. There were no differences of AOFAS scores, VAS pain scores, Karlsson ankle function scores between two groups before surgery, one year and two years after surgery(P>0.05). The AOFAS scores, VAS pain scores, Karlsson ankle function scores of two groups two years after surgery were higher than before surgery(P<0.001). The range of motion, anterior displacement of talus, tilt angle of talus have no differences between two groups before surgery(P>0.05). There were statistic differences of range of motion, anterior displacement of talus, tilt angle of talus between two years after surgery and before surgery(P<0.05). The anterior displacement of talus, tilt angle of talus and ankle varus angle of ligament reconstruction group were less than ligament repair group one year and two years after surgery(P<0.001). [Conclusion] Compared to arthroscopic repair of anterior talofibular ligament, percutaneous reconstruction of ankle lateral ligament complex technique has advantages on restoring ankle lateral stability, which is more suitable for young and middle-aged people or people with higher requirements for ankle joint function.