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In order to raise the level of software engineering for weapons and military supplies, on the base of analyzing and categorizing the problems during the software testing and evaluation for weaponry design and finalization work, 7 kinds of possible reasons for weaponry software development are summarized in this article: bad operability of the KPIs, incomplete analysis for the requirements, inadequate explanations about the software design, nonstandard software programming, imprecise checking on software documentation, weak implementation of internal software testing and evaluation by developer unit, low level of software engineering management. Furthermore, this article lists the various behaviors of the above different weaponry software problems, and demonstrate the deep reasons of the problems by the practices of software testing and evaluation.