Extrusion　and　squirt　was　used　to　process　the　PA6/KF　composite,　and　the　influence　of　fiber　surface　modification　on　the　mechanic　properties　and　failure　morphology　was　discussed.　The　results　show　that　the　PA6/KF1　composite＇s　tensile　strength　and　flexural　strength　are　in-proved,　but　the　impact　strength　is　declined.　The　tensile　failure　morphology　of　PA6/KF0　is　presenting　an　interfacial　taking　off　adhesive,　but　the　tensile　failure　morphology　of　PA6/KF1＇s　just　presenting　a　part.　The　flexural　and　impact　fracture　morphology　show　that　the　adhesive　PAG　on　the　PA6/KF1　is　much　more　than　that　on　the　PA6/KF0.　However,　the　nice　interfacial　adhesive　causes　the　declining　of　the　PA6/KF1＇s　impact　strength.