Abstract: Taking the ‘Honglu’ apple variety as the experimental material, the significance difference analysis method was used to study the effects of bagging and non bagging treatments on fruit quality, in order to provide reference for the development of Guizhou apple planting industry.The results showed that compared with bagging treatment, non bagging treatment increased fruit color index, hardness, vitamin C,soluble sugar, titratable acid, soluble solids, protein, sugar-acid ratio and solid-acid ratio, but decreased fruit smoothness index and water content.Except that the content of Hg was consistent and not significant, the content of Pb, Cd, As, Se, Fe, Ni and Sr in bagging fruits was significantly higher than that in non bagging fruits, while the content of Zn, Co, B,Mn, Ca and Mg was significantly in bagging fruits lower than that in non bagging fruits.The content of Pb and Cd in bagging and non bagging fruits did not exceed the limit value of the National Food Safety Standard Limits of Pollutants in Food（GB 2762-2017）.Compared with bagging treatment, non bagging treatment had stronger color, higher sweetness, better flavor, higher basic nutrients, higher mineral element content and food safety, and lower production cost, which had higher nutritional value and economic value.