Abstract: Grape variety of ‘Summer Black’ was used as experimental material, soaking or spraying with 3 mg·L^-1 sodium selenite solution, the effects of 2 kinds of selenium treatment on grape storage quality and preservation effect were measured to screen out the most effective selenium treatment method by principal component analysis, in order to provide a reference for the application of exogenous selenium in post-harvest storage of grape at room temperature.The results showed that compared with the CK,post-harvest selenium treatment effectively delayed the decrease of the rate of good fruit and hardness, maintained the higher content of vitamin C,soluble solids and titratable acid, inhibited the increase of weight loss rate and malondialdehyde, improved the activity of POD during room temperture storage.According to the comprehensive score obtained from principal component analysis, the fresh-keeping effect of all treatments on ‘Summer Black’ grape stored at room temperature was selenium soaking＞selenium spraying＞CK,and the post-harvest selenium soaking treatment extended 2 days storage time at room temperature to a certain extent.