Abstract:[Objective] To investigate the correlation between fibular head height (FHH) and the occurrence and development of knee osteoarthritis (KOA). [Methods] A total of 116 patients who visited our hospital from June 2015 to June 2021 were included in this study, with the average time interval of two X rays taken of (31.0±2.9) months. The data of the two time points were compared, and pairwise correlation analysis was conducted between K-L grading and other indicators. Using FHH value as dependent variable and other factors as independent variables, multiple linear stepwise regression analysis was performed to explore the correlation between FHH and severity of the knee osteoarthritis. [Results] The age [(60.5±6.8), (63.1±7.0), P<0.001], WOMAC score [(34.0±6.2), (47.7±6.3), P<0.001], K-L grade [I/ II/III/IV, (0/89/22/5), (0/0/22/94), P<0.001], FTA [(178.6±3.7)°, (181.8±5.3)°, P<0.001], JLCA [(2.8±1.1)°, (4.4±1.7)°, P<0.001] were significantly increased, whereas the HSS score [(72.2±8.2), (56.5±7.8), P<0.001], the knee flexion-extension ROM [(109.7±7.8)°, (97.6±6.1)°, P<0.001], MPTA [(86.5±1.8)°, (85.0±2.4)°, P<0.001], AMTP [(8.7±4.2) mm, (5.2±4.9) mm, P<0.001], FHH [(10.3±3.5) mm, (7.9±3.8) mm, P<0.001], FHTPA [(7.5±2.2)°, (4.7±2.0)°, P<0.001] were significantly reduced at the last X ray check compared with those in initial X ray examination. Regarding to pairwise correlation analysis, the K-L grading was significantly positively correlated with age, WOMAC score, FTA, MPTA and JLCA (P<0.05), while was significantly negatively correlated with HSS score, AMTP, ROM, FHH and FHTPA (P<0.05). As results of multiple stepwise regression analysis, the FHH was significantly negatively correlated with JLCA and WOMAC (P<0.05), while significantly positively correlated with ROM and AMTP (P<0.05). [Conclusion] This study visually confirmed that the progression of KOA is related to FHH through continuous imaging measurements, proving that FHH might be influencing factor for the disease progression of KOA, and FHH can be used as an X-ray measurement and evaluation index for KOA.