This　paper　takes　enterprise　benefit　maximization　as　analytical　precondition,　supposes　that　one　enterprise　would　just　face　two　kinds　of　strategies:　whether　to　conduct　a　technological　innovation　project　or　not,and　supposes　the　income　function　and　cost　function　of　two　strategies　are　both　linear.　On　this　base　this　paper　uses　cost-benefit　analysis　method　to　discuss　the　choice　of　enterprise＇s　technological　innovation　strategy　and　its　judging　conditions　under　the　different　kinds　of　situation,　and　then　gives　the　economic　explanation　for　the　analytical　conclusions.