Aiming　at　the　problems　of　closed　indoor　environment　and　complex　spatial　constraints,　which　lead　to　the　high　cost　and　time-consuming　of　indoor　information　collection　using　traditional　surveying　and　mapping　technology,　a　method　for　automatic　extraction　and　modeling　of　indoor　spatial　data　based　on　CAD　is　proposed.　Use　the　existing　DXF　format　indoor　architectural　drawings　to　extract　spatial　information.　According　to　different　characteristics　of　DXF　indoor　architectural　components,　two　methods　based　on　rules　and　spatial　relationships　are　used　to　extract　each　spatial　feature.　Then,　the　H3　grid　structure　is　used　to　grid　the　extracted　spatial　features　to　generate　grid　sets;　finally,　using　the　anchor　points　of　DXF　primitives,　the　grid　sets　of　spatial　features　are　matched　with　text　primitives　to　obtain　subject　words　or　keyword　information　and　establish　indoor　data　in　the　form　of　database　tables.　The　experimental　results　show　that　this　method　reduces　the　grid　model　modeling　workload　to　a　great　extent　and　improves　the　map　update　rate　at　the　same　time.　　©　2023　IEEE.