The　high　pH　and　salinity　of　textile　wastewater　is　a　major　hindrance　to　azo　dye　decolorization.　In　this　study,　a　mixed　bacterial　consortium　ZW1　was　enriched　under　saline　(10%　salinity)　and　alkaline　(pH　10.0)　conditions　to　decolorize　Methanil　Yellow　G　(MY-G).　Consortium　ZW1　was　mainly　composed　of　Halomonas　(49.8%),　Marinobacter　(30.7%)　and　Clostridiisalibacter　(19.2%).　The　effects　of　physicochemical　factors　were　systematically　investigated,　along　with　the　degradation　pathway　and　metagenome　analysis.　The　co-carbon　source　was　found　to　be　necessary,　and　the　addition　of　yeast　extract　led　to　93.3%　decolorization　of　100　mg/L　MY-G　within　16　h　(compared　with　1.12%　for　control).　The　optimum　pH,　salinity,　temperature　and　initial　dye　concentration　were　8.0,　5-10%,　40　degrees　C　and　100　mg/L,　respectively.　The　typical　dye-related　degradation　enzymes　were　most　effective　at　10%　salinity.　Consortium　ZW1　was　also　able　to　differentially　decolorize　five　other　direct　and　acidic　dyes　in　a　short　period.　Phototoxicity　tests　revealed　the　detoxification　of　MY-G　degradation　products.　Combining　UV-vis,　FTIR　and　GC-MS　detection,　the　MY-G　degradation　pathway　by　consortium　ZW1　was　proposed.　Furthermore,　metagenomic　approach　was　used　to　elucidate　the　functional　potential　of　genes　in　MY-G　biodegradation.　These　results　signify　the　broad　potential　application　of　halo-alkaliphilic　consortia　in　the　bioremediation　of　dyeing　wastewater.