This paper conducted in-depth analysis and research of the problem of the lack of armored vehicle computer system usability evaluation index system．This paper firstly studied the basic principles of building the usability evaluation index system of armored vehicle computer system, then analyzed the main contents of usability evaluation, finally it brought forwards the usability evaluation index system of armored vehicle computer system from the effectiveness, efficiency and satisfaction aspects. The research shows that usability evaluation can not only find usability problems of armored vehicle computer system to provide basis for designer, but also improve system to give reference for the seller..