In　high-throughput　drilling　of　the　compacted　graphite　iron　(CGI),　which　is　a　high-strength,　difficult-to-machine　cast　iron　for　lightweighting　applications,　the　drill　temperature　and　wear　are　critical　for　the　drilling　outcome.　As　the　drill　main　cutting　edges　are　subject　to　the　high　cutting　forces,　the　elevated　temperature　along　the　cutting　edges　greatly　impacts　the　drill　life.　However,　there　is　a　lack　of　research　to　predict　the　spatial　and　temporal　cutting　edge　temperature　distributions　as　well　as　its　change　along　the　tool　wear　progression.　A　tool-foil　thermocouple　method　is　adopted　in　this　study　to　directly　measure　the　drill　main　cutting　edge　temperature　in　high-throughput　CGI　drilling.　Results　are　cross　validated　based　on　a　combination　of　finite　element　modelling　and　experimental　measurement　of　the　cutting　edge　temperature　from　embedded　thermocouples　1.0　mm　away　from　the　cutting　edge.　Drilling　experiments　using　the　tool-foil　measurements　show　that,　along　the　main　cutting　edge,　the　drill　center　has　a　higher　temperature　than　that　of　the　outer　corner.　With　increasing　drilling　depth,　the　temperature　difference　along　the　main　cutting　edge　gradually　decreases.　Moreover,　adhesion-dominated　tool　wear　has　changed　the　cutting　edge　temperature,　leading　to　higher　temperature　rise　in　the　middle　and　outer　corner　regions　along　the　cutting　edge　than　at　the　drill　center.　Similar　trend　occurs　in　the　drill　flank　wear,　thrust　force,　torque,　and　average　cutting　edge　temperature　as　the　number　of　holes　made　by　the　same　drill　increases.　©　2025　The　Society　of　Manufacturing　Engineers