With　the　rapid　development　of　network　technology,　security　data　is　becoming　more　and　more　complex.　Since　the　multi-source　heterogeneous,　complex　scattered　data　security　have　been　expanding,　traditional　relational　database　difficult　toefficiently　handle　complex　and　diverse　analysis　of　the　relationship　between　big　data　security.　In　view　of　the　above　problems,　this　paper　proposes　an　ontology-based　network　security　knowledge　map　design　method　to　more　accurately　describe　the　complex　relationship　between　security　elements.　According　to　the　actual　needs　of　security　analysis,　using　the　ontological　idea,　design　a　multi-level　security　ontology　system　and　study　the　relationship　between　ontology;　Propose　a　mapping　mechanism　between　the　security　ontology　and　the　security　knowledge　map;　The　security　knowledge　map　for　multi-source　data　is　constructed　by　using　the　graph　database　storage　mode　to　provide　important　technical　support　for　the　construction　and　application　research　of　the　network　security　knowledge　base.