Abstract: Pot experiment was carried out to study the effects of dual inoculation of a species of VA mycorrhizal fungi (Glomus mosseae) and the species of Acetobacter diazotrophicus (Pal5) on growth, phosphorus uptake and mycorrhizal infection rate of super sweet corn. The results showed that mycorrhizal infection of single inoculation (Gm) has been improved, but the effect of double inoculation of Pal5 + Gm was more than that of the single inoculants Gm. So both the single or double inoculation could change the uptake of phosphorus, promote the growth of corn, and increase the biomass and the fruit weight. The double inoculation had positive reciprocal effects on the mycorhizal infection and the plant growth. The biomass order was Pal5 + Gm>Pal5>Gm>CK in the prophase, but that changed as Pal5 + Gm>Gm>Pal5>CK in the latter stage.