Graphite　phase　carbon　nitride　(g-C3N4)　composite　structure　materials,　as　a　kind　of　stable　compound　with　graphite-like　structure,　has　attracted　more　and　more　attention　due　to　its　excellent　properties,　such　as　being　able　to　absorb　solar　energy,　stable　chemical　and　optical　properties　and　having　a　suitable　oxidation　potential.　However,　its　application　in　the　field　of　photocatalysis　is　limited　by　its　small　specific　surface　area　and　poor　dispersibility.　To　solve　this　problem,　ultra-thin　g-C3N4　nanosheets　are　often　prepared　using　peeling　methods.　In　this　paper,　the　current　status　and　mechanism　of　thermal　oxidation　peeling,　ultrasound-assisted　liquid-phase　peeling　and　acid　base　chemical　peeling　are　reviewed　in　detail.　In　addition,　the　future　research　directions　of　ultra-thin　graphite　like　carbon　nitride　nanosheets　are　discussed.