Reliability and maintainability of the antitank missile system affect the armament battle effectiveness directly. In this paper, the actuality of a new-style antitank missile reliability and maintainability is analyzed. The existed problems are discussed and the measures needed to enhance the design and tests of reliability and maintainability of the product and the educational level of the operator are provided. At the end of the paper, after-sale service system is introduced. The usability and the efficiency of armament would be increased and the engineering technical personnel detect the problems as soon as possible with the method.