Jidan209, a corn variety highly susceptible to head smut and common smut of corn, was selected as mate-rial and inoculated with Ustilago maydis and Sporisorium reilianum. Four methods were adopted, including injection of corn coleoptile, mixing soil with the disease fungus, watering the roots of maize seedlings with liquid cultures of Ustilago maydis and Sporisorium reilianum, soaking maize seeds with liquid cultures of Ustilago maydis and Sporisorium reilianum. Screening The efficient inoculation methods of head smut and common smut of corn were screened by comparing and observing the incidence of corn plants under the simulation of the field condition. The results showed that injection of corn coleoptile was the best inoculation method for common smut of corn. Injection of corn coleoptile and soaking maize seeds with culture liquids of Sporisorium reilianum were better than other inoculation methods of head smut of corn. This study will be beneficial for us to screen cron varieties resistant to head smut and common smut of corn.