To　replace　traditional　machining　fluids,　cooled　air,　minimum　naturally　dissoluble　oils　and　a　small　amount　of　water　are　used　to　form　combined　mist-jet　(CMJ)　eco-machining　fluids.　A　large　number　of　machining　experiments　are　carried　out　on　a　precision　NC　plane　grinder　by　using　CMJ　eco-machining　fluids　in　comparison　with　a　traditional　machining　fluid　such　as　emulsion　flood　coolant.　The　experimental　results　have　further　shown　that　the　new　eco-machining　fluids　can　acquire　the　same　grinding　accuracy　and　higher　by　comparison　with　emulsion　flood　coolant.　Clearly,　CMJ　eco-machining　fluids　have　excellent　lubrication　and　cooling　effects　and　are　applicable　to　grinding　processes　to　some　extent.