Graphitic　carbon　nitride　(g-C3N4)　is　considered　a　potential　photoactive　semiconductor　for　photocatalytic　hydrogen　evolution　(PHE).　Although　being　active　in　producing　hydrogen,　it　is　in　general　suffering　from　severe　charge　recombination　rate,　low　mobility　of　charge　and　narrow　visible　light　response　range　largely,　which　has　restricted　its　greater　application.　Existing　reviews　on　g-C3N4　are　lacking　of　systematic　and　summative　view　on　the　effects　of　the　physical-chemical　structure-activity　relationship　between　g-C3N4　and　the　modification　involving　phosphorus　(P).　Many　studies　indicate　that　adding　P　into　g-C3N4　could　effectively　elevate　the　photo-activity.　Underlying　reasons　for　the　observed　improved　photo-activity　are　discussed　in　this　review.　Here,　P-containing　g-C3N4　photocatalysts　are　grouped　into　the　categories　of　P　elemental　doping,　composite　with　elemental　P,　as　well　as　the　addition　of　metal　phosphide　as　cocatalysts.　These　P-containing　g-C3N4　possess　novel　properties　demonstrating　favorable　photocatalytic　activities　as　compared　with　the　other　elemental　(such　as　O,　S,　B)-based　materials.　Therefore,　in　this　mini　review,　we　summarize　and　discuss　the　advances　on　the　P-containing　g-C3N4　photocatalysts,　including　the　preparation　strategies,　physicochemical　properties,　the　application　for　hydrogen　production　as　well　as　the　related　reaction　mechanism.　Importantly,　the　physical-chemical　structure-activity　relationship　between　g-C3N4　and　the　integrated　P　is　revealed.　Finally,　an　overview　of　the　current　research　status　and　challenges　on　future　is　presented,　which　would　be　helpful　in　designing　and　developing　other　P-containing　photocatalysts　for　various　photocatalytic　applications.　(c)　2021　Hydrogen　Energy　Publications　LLC.　Published　by　Elsevier　Ltd.　All　rights　reserved.