In order to determine the safety and immunological effect of O-A-Asia1 type of FMD trivalent inactivated vaccine，the safety test and minimum immunological dose test were conducted for 2 and 3 fold injection dose of FMD，respectively . The results showed that the vaccine was safe for six-month or older camels without any side effects. The appropriate immunization dose was 3.0 mL per camel to six-month camels. This type of vaccine was safe and effective for camels. And O，A and Asia 1 type 3 serotypes of FMD could be prevented by only once vaccination.