Photocatalytic　degradation　is　an　emerging,　efficient　and　energy-save　technology　for　the　removal　of　organic　contaminants　from　the　water　environment.　With　the　development　of　two-dimensional　functional　materials,　molybdenum　disulfide　(MoS2)　has　become　one　of　the　most　popular　emerging　co-catalysts　due　to　its　high　photocatalytic　activity,　strong　adsorptivity,　low　cost　and　non-toxicity,　especially　applied　to　the　photocatalytic　degradation　of　organic　contaminants.　In　this　paper,　we　review　the　recent　research　progresses　of　graphene,　carbon-nitrogen　compounds,　TiO2　and　bismuth　compounds　supported　on　MoS2　co-catalyst,　which　were　applied　to　photocatalytic　degradation　of　various　organic　contaminants　such　as　methylene　blue　(MB),　methyl　orange　(MO)　and　rhodamine　B　(RhB),　etc.　Meanwhile,　the　basic　processes　of　photocatalytic　degradation　of　organic　pollutants　have　also　been　briefly　analyzed　and　compared.　More　importantly,　MoS2　co-catalyst　plays　an　integral　role　in　nanocomposites,　especially　in　accelerating　photo　induced　electron　transport　and　reducing　electron　recombination　rates.　It　is　indicated　that　MoS2-based　composites　are　promising　photocatalysts　for　photocatalytic　degradation　of　environmental　pollutants.　(C)　2018　Institution　of　Chemical　Engineers.　Published　by　Elsevier　B.V.　All　rights　reserved.