In　the　investment　decision-making　process,　we　often　make　a　misjudgment　for　a　variety　of　feelings　and　different　backgrounds.　Avoiding　this　phenomenon,　this　paper　introduces　the　average　share　price　of　the　moving　average　line　and　the　concept　of　fuzzy　control　study　of　stock　investment　by　the　overall　trend　of　stock　prices　traded　investment　judgments.　The　simulation　results　show　the　feasibility　of　certain.