Purpose:To assess the role of MRI in evaluation of the post-operative knee joint and assessment of the post complications after ACL, meniscal and cartilage surgical repair procedures Patients and methods:A prospective study recruited 50 patients, their ages ranged between 18 and 45 years after repair of ACL , menisci and cartilage. All patients were referred from the orthopedic department between January 2014 and June 2015 with symptoms and signs suspicious of complications. The patients were divided into three groups , group I after ACL repair included 26 patients , group II after meniscal repair and included 16 patients , group III after cartilage repair and included 8 patients. MRI knee was performed for all patients after meeting inclusion criteria. Results:(A) In group I Graft impingement was the most frequentlyencountered complication representing 6/26 (23%). Partial tear was encountered in 3/24 (11.5%). Complete tear was seen in two patients for each (7.69%). One patient had intact graft with bright signal (3.85%). One patient had cystic degeneration with ganglion cyst (3.85%). The remaining 13/26 (50 %) patients had negative MRI with intact graft. (B) In group II Retorn meniscus was the most frequently encountered complication representing 5/16 (31.25%). Effusion was encountered in 3/16 (18.75 %). One patient had osteonecrosis (6.25%). The remaining 7/16 (43.75 %) patients had negative MRI with intact meniscus. (C) In group III Delamination was the most frequently encountered complication representing 28 (25%). Intra-articular adhesions was encountered in 1/16 (12.5 %). Also One patient had hypertrophbic synovitis (12.5%). The remaining 4/8 (50 %) patients had negative MRI with intact repaired cartilageConclusion:MRI proved as an accurate method for evaluation of the knee joint after ACL, meniscus and cartilage repair that can help predict post-operative complications.