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Ten novel 2-alkylthio-5-(3, 4, 5-tribenzyloxyphenyl)-1, 3, 4-oxadiazole derivatives (5a-j)were synthesized from methyl 3, 4, 5-trihydroxybenzoate by etherification, hydrazidation,cyclization and thioetherification reactions. The structures of 5a-j were confirmed by 1HNMR,MS spectra and elemental analysis. The results indicated that most of the compounds 5 exhibited good fungicidal activities. The activity of 5h is higher than 90% against Fusarium oxysporum and Botrytis cinereapers in 50 mg/L.