In traumatic knee dislocation, vascular injury is one of the most serious complication. After pertinent management of acute vascular problems, we should take care of the ligamentous injury involving both the ACL and PCL which are the main causes of knee instability, and consequent traumatic degenerative changes. No standard technique of reconstruction has been reported concerning these ligamentous injuries up to now as far as we know. Authors tried a new management which reconstruction was done simultaneously on both the ACL and PCL injuries. Bone-Achilles tendon autograft was used as PCL substitute in all the cases, and which turned out to be a very efficient one for the control of anterior-posterior displasement as well as rotary instability. Bone-patellar tendon-bone autograft or bone-Achilles tendon autograft was good for the reconstruction of the ACL bone-patellar tendon-bone in two cases, bone-Achilles tendon in two cases, and semitendinosus tendon also in two cases. After 6 months of operation, all the patient returned to the previous level of walking without crutches. This management showed outstanding results in terms of knee stability and subjective symptoms.