Objective To evaluate application of fluid-gas exchange in retinal detachment after vitrectomy. Methods 8 cases ocular injury,retinal detachment after vitrectomy.all of 8 cases retinal detachment is happen of a short time,no PVR.reattachment of retinal after fluid-gas exchange,and operated by scleral burcle. Results All of 8 cases reattachment of retinal. Conclusions Application of fluid-gas exchange in retinal detachment after vitrectomy,is very effective and safe.