Anterior cruciate ligament injuries are common injuries to knee ligaments. The injury can be treated by ligament reconstruction surgery. Post-operative rehabilitation is very important and there are some wrong practices to be avoided. 1. No elevation of the affected limb after surgery, no ice: If you don’t elevate the limb and apply ice, it is likely to cause a high degree of swelling in the affected limb, which is not conducive to recovery. 2. Early weight bearing after surgery will aggravate the swelling and pain. 3. Running and jumping too early after surgery: if you run and jump too early, it is not conducive to the full recovery of the ligament, and more importantly, you have to avoid falling, etc. The recovery period of anterior and posterior cruciate ligament reconstruction of the knee is long, and it needs persistence and hard work. It is recommended that patients start the rehabilitation training as early as possible under the guidance of a professional doctor, and do not train blindly, so as to avoid the adverse consequences.