Automated　equipment　and　systems　with　different　functions　and　from　different　manufacturers　are　widely　existed　in　the　workshop/factory.　They　bring　a　large　number　of　heterogeneous　information　distributed　at　different　network　levels.　The　interconnection　and　interoperability　between　heterogeneous　systems　and　devices　is　the　basis　for　the　informationization　and　intelligent　manufacturing,　and　is　a　core　issue　in　digital　workshop　integration.　The　key　to　solving　this　problem　is　to　establish　a　standard　and　consistent　information　model.　The　architecture　of　the　information　model　of　digital　machining　workshop　for　machine　tools　is　proposed　based　on　the　analysis　of　its　structure,　functional　model　and　information　flow.　By　clarifying　the　element　definition,　modeling　rules　and　methods,　the　standardization　and　consistency　of　the　information　model　of　the　digital　workshop　is　achieved.　Then,　the　rules　that　map　the　information　model　in　to　the　OPC　UA　(Unified　architecture)　address　space　is　established.　The　approach　for　implementing　data　storage　and　interaction　of　the　information　model　based　on　the　OPC　UA　server/client　are　also　discussed.　Finally,　the　feasibility　of　mapping　the　information　model　to　the　OPC　UA　address　space　is　verified.　An　instantiated　information　model　is　established　based　on　an　instance　of　application　scenario,　and　the　practicability　of　the　information　model　is　tested.　©　2019　Journal　of　Mechanical　Engineering.