Poor　mechanical　stability　of　the　superhydrophobic　surface　is　the　fundamental　reason　that　limits　its　wide　application.　In　the　present　study,　metal　rubber　(MR)　with　a　three-dimensional　elastic　porous　characteristic　was　applied　as　the　substrate.　Multiwalled　carbon　nanotubes　(MWCNTs)　were　filled　into　the　pores　of　MR　through　suction　and　filtration　of　the　MWCNTs　suspension.　Using　an　in　situ　bonding　method,　MWCNTs　were　anchored　in　the　MR　pores　by　poly(dimethylsiloxane)　(PDMS).　Consequently,　a　type　of　superhydrophobic　material　with　a　three-dimensional　network　frame　protection　was　constructed.　The　emulsion　separation　mechanism　of　superhydrophobic　MR　was　investigated　using　the　plane　random　segmentation　theory　and　theoretical　model　of　deep　filtration.　By　analysis　of　the　depth　retention　effect　in　the　separation　process,　the　separation　efficiency　of　the　emulsion　was　predicted.　In　addition,　the　results　show　that　the　prepared　superhydrophobic　MR　had　an　excellent　purification　capability　for　a　water-in-lubricating　oil　emulsion　and　outstanding　mechanical　and　chemical　stability.　©　2021　American　Chemical　Society