The　conventional　measurement　apparatuses　are　unsuitable　to　measure　the　subsurface　settlement　of　the　deep　filled　ground　over　a　large　area　due　to　the　technical　difficulties　associated　with　installation,measuring　during　construction,and　automatic　measurement.In　this　study,a　new　apparatus　is　developed　to　measure　the　subsurface　settlement　within　a　deep　filled　ground.The　major　components　of　the　new　apparatus　include　an　inductance　frequency-modulated　displacement　meter,a　displacement　transfer　rod,a　settlement　plate,an　anchorage　head,a　protective　sleeve,and　a　settlement　observation　rob.In　particular,the　inductive　frequency-modulated　displacement　meter　is　connected　in　series　with　the　displacement　transfer　rod,which　is　used　to　measure　the　compression　settlement　of　two　adjacent　monitoring　points.The　inductive　frequency-modulated　displacement　meter　of　the　new　apparatus　can　be　connected　to　an　automatic　data　acquisition　system　such　that　the　subsurface　settlement　can　be　measured　automatically.The　new　apparatus　is　first　installed　into　a　borehole　within　original　ground　and　then　an　exploratory　well　within　filled　ground　gradually　as　the　construction　of　earthworks　proceeds.The　subsurface　settlement　at　different　depths　can　then　be　obtained　by　summing　the　incremental　settlements　measured　between　adjacent　monitoring　points.A　field　experiment　via　application　of　the　new　apparatus　to　a　deep　filled　ground　indicates　that　the　design　of　the　new　apparatus　is　reasonable,the　installation　method　is　reliable,and　that　accurate　and　continuous　measurements　of　the　subsurface　settlement　can　be　obtained　from　the　new　apparatus.The　new　apparatus　is　suitable　for　measuring　subsurface　settlement　of　the　deep　filled　ground　which　is　made　up　of　compacted　homogeneous　fill　soils　in　layers　over　a　large　area.　©　2018,　Science　Press.　All　right　reserved.