Most fractures of proximal humerus occur through osteoporotic bones in older patients. High energy trauma may result in such fractures at any age. Most common mechanism is a simple fall on the arm. Strong muscular contraction is the proposed mechanism for greater Tuberosity fractures. This is seen in cases of electric shock or seizure. Once the fragments separate muscle forces contribute to their displacement. The shaft is generally drawn anteriorly and medially by the pectoralis major. Once the patient is fit for surgery, will under goes open reduction and internal fixation with proximal humerus interlocking system(PHILOS)plate and screws under brachial plexus block or general anesthesia, Patient will be placed in Beach chair. All the patients were approached by Deltopectoral approach, cephalic vein is dissected and retracted, internervous plane between deltoid and biceps tendon. Once fracture site is exposed, fracture is reduced provisionally with K wires and checked in fluoroscopy. And final fixation done with PHILOS plate and position is confirmed in fluoroscopy. The mode of injury commonly observed in our series was road traffic accidents accounting for 23 (76%), 7 (24%) patients had a history of fall. These observations was found to be consistent with the studies in literature which revealed 19 (45%) road traffic accidents, 20(50%) history of fall.