The purpose of this study was to compare the effects of different intermediate-effect dilution powders on the quality of boar semen stored at normal temperature, 9 kinds of intermediate-effect dilution powders were selected ，including 3 kinds of domestic and 6 kinds of foreign, respectively numbered as A, B, C, D, E, F, G, H and D, 12 Duroc boars semen were used for normal temperature preservation. By measuring the pH value, motility, effective preservation time, deformity rate, acrosome integrity rate and plasma membrane integrity rate during the effective period of sperm motility. The results showed that the sperm motility of diluted powder E was significantly higher than that of diluted powder C, D, F and G after storage for 3 days (P<0.05). The semen diluted with diluted powder E and I had the longest effective storage time, reaching 10.91 d and 10.33 d, significantly higher than the other 6 species (P<0.05). The deformities of diluted powder D, E, G and H were lower, diluted powder D and E were significantly lower than the other 4 (P<0.05). The sperm acrosome integrity rate of diluted powder A was always the highest after the 2nd day, which was significantly higher than that of diluted powder C, D and F (P<0.05). The sperm membrane integrity rate of diluted powder E and H was significantly higher than that of diluted powder D and F (P<0.05). Taken together, the qualified rate of the 9 kinds of medium effect dilution powder diluted boar semen reaching the national standard and product standard was 88.89% after being stored at normal temperature. Among them, dilution powder E, H and I have the best effect. The influence of diluent powder on boar semen quality should include several indexes.