The aim of this study is to explore the clinical curative effects of bone anchor assisted knee extensor mechanism reconstruction, and analyze the relative variables affecting outcome with a logistic regression method. Reconstruction was performed in 83 patients (Jan 2012-Dec 2015), including 54 males and 29 females (13 to 53 y of age, mean age 24 y) with an average disease course of 9 y (range from 1 to 13 y). Patients were clinically evaluated via the Lysholm and Kujula knee scores and the Insall criterion, and postoperative follow-up time varied from 12 to 48 months (average 28 months). At the first year follow-up time point, all patients were significantly improved from the Lysholm (69.33 ± 8.38 preoperatively and 88.65 ± 12.93 postoperatively) and Kujula (69.33 ± 8.38 preoperatively and 88.65 ± 12.93 postoperatively) knee scores (P<0.05). According to the Insall Criterion Evaluation, the results were indicative of 56 “Excellent” cases, 10 “Good” cases, and 9 “Normal” cases, with a ratio 79.5% of “Excellent” and “Good” cases. Logistic regression analysis suggested that this reconstruction had a better effect in adolescent patients, while Patella Alta and flat lateral femoral condyle exerted poor influence on procedure outcome.