AIM:To analyze the clinical effects of the argon laser photocoagulation for the treatment of retinal vein occlusion(RVO) .METHODS:Totally 57 cases with RVO treated by argon laser photocoagulation were followed up. Observe patients'' visual acuity, fundus change, complications and evaluate the clinical value of argon laser photocoagulation in treating RVO. Laser therapy were divided into macular grid photocoagulation, local and pan-retinal photocoagulation according to the fundus fluorescein angiography(FFA).RESULTS:After laser treatment, visual acuity of 23 eyes improved, 25 eyes had no change, 9 eyes declined. FFA was checked after laser treatment(observing the area changes of retinal capillary in non-perfusion area, as well as the regression of neovascularization), 54 eyes were effective, 3 eyes occurred neovascular glaucoma(NVG). Laser photocoagulation had no significant effect to late complications in macular area.CONCLUSION:Laser photocoagulation can improve central visual acuity, promote the absorption of retinal edema, hemorrhage and exudation, reduce neo vessels caused by RVO, which has significant effect on preventing and delaying proliferative vitreoretinopathy(PVR) and secondary NVG.