Our study was conducted at the orthopaedics department of Institute of Post Graduate Medical Education and Research & S.S.K.M. Hospital, Kolkata–20, from December 2016 to October 2018.In this prospective longitudinal study 22 patients of 5–15 years age group with cubitus varus deformity underwent Corrective osteotomy by Reverse dome osteotomy technique.All patients are followed up post up for avg 1 year 5 months (ranges from 4 months to 24 months) . Pre–operatively carrying angle, lateral condylar prominent index, range of motion were recorded. The patients were treated with dome osteotomy.A posterior longitudinal midline incision was used for the osteotomy. After osteotomy, fixation of the osteotomy site was done by giving 2/3 lateral K– wires and if required 1 medil k–wire. There were no intraoperative complications. Post–operatively, Two patient developed superficial skin infection. Other complications in our study wereone patient had pin–tract infection; one patient had ulnar nerve neurapraxia; one patient had cosmetically unacceptable scar. But no elbow stiffness, pin loosening , nonunion of osteotomy site was there. Pendulum exercises of the shoulder and active finger movements were started from the immediate post operative period. Wound checking was done at the 4th post operative day and suture removal at the 12th post operative date. Post operative check radiograph was taken for documentation. Plaster of Paris back slab was removed at the 3rd week and k–wire at the 4th week. Active assisted range of motion exercises was started by the 3rd week. Vigorous active range of motion exercises of the elbow was encouraged during every follow up. Clinicoradiological assessment was done initially at the interval of 4 weeks for the first 6 months and every 8 weeks for next one year, followed by every three months till final follow up. The results were graded according to the pre–operative and post– operative carrying angle, movement of flexion and extension, lateral condylar prominence index and they were statistically evaluated. Pre–operative and post–operative extension, carrying angle and lateral condylar prominence index has got statistical significance.