Increased　temperature,　salinity　and　alkalinity　restrict　the　biodecolorization　rate　of　textile　wastewater.　In　the　present　study,　the　halophilic　alkalithermophilic　bacterial　consortium　ZSY,　which　can　decolorize　azo　dyes　under　10%　salinity,　pH　10　and　50　degrees　C,　was　enriched.　It　can　decolorize　Metanil　Yellow　G　(MYG)　under　a　wide　range　of　pH　values　(8-10),　temperatures　(40-50　degrees　C),　dye　concentrations　(100-400　mg/L)　and　salinity　levels　(1%-10%).　Laccase　(Lac),　lignin　peroxidase　(Lip),　nicotinamide　adenine　dinucleotide-dichlorophenol　indophenol　reductase　(NADH-DCIP)　and　azoreductase　are　involved　in　the　decolorization　process.　A　decolorization　pathway　of　MYG　was　proposed　via　gas　chromatography-mass　spectrometry　(GC-MS)　and　Fourier　transform　infrared　spectroscopy　(FTIR).　The　toxicity　of　MYG　decreased　after　decolorization　by　ZSY　consortium.　A　metagenomic　sequencing　approach　was　subsequently　applied　to　identify　the　functional　genes　involved　in　decolorization.　Overall,　this　halophilic　alkalithermophilic　bacterial　consortium　could　be　a　promising　candidate　for　the　treatment　of　textile　wastewater　in　environments　with　increased　temperature,　salinity　and　alkalinity.