In order to select chemicals to control the sweet potato soft rot,the inhibition test of five fungicides to Rhizopus stolonifer(Ehr.ex.Fr.) Vuill.was carried out in laboratory by growth rate method.The results showed that 80% carbendazim WP and 70% thiophanate-methyl ultrafine WP could obviously inhibit the colony growth of Rhizopus stolonifer(Ehr.ex.Fr.) Vuill.,while the others had no obvious control effect.