Abstract: Objective To analyze and evaluate the diagnosis and treatment of synovial cartilage tumors by arthroscopic surgery. Methods from January 2011 to December 2016, our department has a clear diagnosis and treatment of knee synovial chondromatosis were 17 cases, preoperative weight-bearing walking pain visual analogue scale (VAS) for (3.81±2.02); Lysholm score was (43.27±7.91) points. To improve the preoperative examination and examination of the patients after arthroscopic diagnosis and treatment, and the articular cartilage free body to send the case to check the case to clear the diagnosis, and arthroscopic debridement. Given the sodium hyaluronate injection after operation Triamcinolone Acetonide Injection.Results postoperative pathological examination showed: synovial chondromatosis, patients were followed up for 4 ~ 24 months, average 12.7 months, patients with signs of remission, knee flexion improved compared with preoperative, no other complications, our department during follow-up no synovial chondromatosis of recurrent patients. The VAS score decreased to the last follow-up (2.5 ±0.4), and there was a significant improvement (P＜0.05）Lysholm score was increased to (86.5±4.2) after the recent follow-up, and the difference was significant (P＜0.05). Conclusion synovial chondromatosis has strong concealment, the use of arthroscopic surgery can confirm the diagnosis of synovial chondromatosis, and combined treatment of locally closed analgesia in the treatment of synovial chondromatosis of the feasibility of the approach, clinicians can reference.