Abstract:[Objective] To evaluate the accuracy of knee space rotary compression test by compared with traditional physical examina- tion. [Methods] A total of 150 patients (163 knees) who underwent arthroscopic knee surgery from February 2020 to June 2021 were en- rolled in this study. As the results of arthroscopy were used as the final diagnostic criteria, the sensitivity and accuracy of the joint space ro- tary compression test, joint space tenderness test, passive hyperextension and flexion test, McMurray test and Apley grinding test were com- pared in the diagnosis of meniscus injury. [Results] Among the 5 physical examination tests, the rotary compression test with sensitivity (93.75%) , negative predictive value (75.76%) and accuracy (88.96%) proved significantly superior to the other 4 examination test sensitivi- ty (P<0.05) . The sensitivity of rotary compression test in term of different meniscus parts, was of 90.48% for the anterior horn and anterior junction, 95.74% for the body, 87.69% for the posterior horn and posterior junction, and 93.75% for compound tear with more than 2 inju- ries simultaneously. [Conclusion] The knee space rotary compression test has high sensitivity and accuracy in the diagnosis of meniscus in- jury.