Vacuum-assisted closure (VAC) is a noninvasive, active wound management system that exposes a wound bed to local sub atmospheric pressure, removes fluid from the extravascular space, improves circulation, and enhances the proliferation of granulation tissue. The purpose of this study is to know the rate of wound infection, number of days required for making the wound fit for skin cover procedures, number of days required for formation of uniform granulation tissue bed in the wound healing treated by Vacuum Assisted Closure after primary fixation of fracture.Patients between 18 to 60 years were included in this prospective randomized controlled trial. Primary internal Fixation of fracture was done as soon as possible followed by VAC application. Functional outcome of cases recorded during each follow up according to Johner and Wruh’s (1983).According to this study, 30 patients with open fractures of both bone leg after primary internal fixation with VAC application. During follow up effective decrease (mean ± SD) in wound size after VAC therapy was 9.97±9.59 cm2 with P-value 0.0481. This technique has resulted in the effective decrease in wound size, infection and give a better functional outcome.The greatest advantage of VAC was found to facilitate rapid formation of granulation tissue on wounds with exposed tendons, bones, raw area wounds and exposed implants hence decrease healing time and minimize soft tissue defect coverage procedures.