The ankle arthroscopy system includes: 2.7mm diameter small arthroscope, extraction forceps, scrapers, planer, power system, cold light system, camera and playback system, etc. Compared with traditional open ankle surgery, ankle arthroscopy has three major advantages: 1) clear surgical field of view, which can better deal with lesions in the ankle joint; 2) minimally invasive surgery, which only requires two to three small 15px incisions to complete the surgery; 3) few surgical complications and fast recovery for patients. The main indications for ankle arthroscopy: 1. synovial inflammatory disease; 2. ankle impingement, including intra-articular bone redundancy; 3. intra-articular free body of the ankle; 4. ankle cartilage injury, most commonly the diagnosis and treatment of talar cartilage injury; 5. ankle instability, including reconstruction of lateral ankle ligament complex injury; 6. minimally invasive ankle arthroscopic fusion; 7. adjuvant treatment of ankle fracture; 8. Microscopic release of stiff adhesions of the ankle joint. Osteochondral injuries of the talus are commonly seen in patients with a history of ankle trauma, with walking pain as the main complaint, which affects daily life. It is a common clinical condition, but is one of the most difficult ankle conditions to diagnose and manage. The talar osteochondral injury often involves the cartilage surface of the talar dome and/or subchondral bone and is the main cause of chronic pain in the ankle joint. Ankle arthroscopic surgical treatment with microscopic ankle cleaning, lesion removal combined with drilling or microfracture can achieve good results. Minimally invasive ankle arthroscopy for osteochondral injuries of the talus has the advantages of less trauma, fewer complications, and facilitates early functional recovery.