Objectives: To evaluate the effectiveness of rehabilitation intervention on knee recovery among patients with limited mobility after lower extremity injuries. The results from this study contributed to improving the understanding of the rehabilitation process on patients with limited knee mobility after surgery. Method: a quasi-experimental design study was conducted to compare the differences between before and after rehabilitation intervention from January 2021 to September 2021. 23 patients were treated at the Rehabilitation Department in Nam Dinh General Hospital were selected to participate in the study. Results: 65,2% of injuries were caused by traffc accidents, 8,7% were due to work accidents and 8.7% were due to daily-life accidents. The time from surgery to rehabilitation was: 43,5% below 1 month, 4,3% over 6 months. There was a signifcant change in the limb size difference between the operated leg and the normal leg. After applying rehabilitation intervention, all patients had an improvement in joint range ofmotion, muscle grade, muscle function according to Lysholm scale, pain level according to VAS scale before and after treatment, especially in cases of functional recovery less than 1 month after surgery. Conclusions: The rehabilitation effectiveness was good after patients were applied rehabilitation methods such as Paraffn, Electropulse, and Motiontherapy due to the improvement in range of motion (ROM), muscle level, muscle functionaccording to Lysholm scale, pain level according to VAS scale early after surgery.