The　integration　of　heterogeneous　photocatalysts　with　nickel　catalysis　is　garnering　considerable　interest　for　their　capacity　to　enable　distinct　metal-photoredox　processes　for　organic　synthesis.　However,　the　challenge　about　robustness　and　recyclability　of　the　photocatalyst　persists.　Herein,　a　crystalline　carbon　nitride　(MCN-B)　photocatalyst　with　intentionally　introduced　defects　and　a　dedicated　designed　active　site　has　been　presented.　Results　reveal　by　incorporating　the　deprotonated　cyano-group　(N--CN)　sites,　this　host　material　could　provide　stable　binding　sites　for　Ni　(II)　ions　through　the　Hard-Soft　Acid-Base　(HSAB)　effect,　thereby　facilitating　charge　transmission　between　semiconductor　and　metal　centers.　Consequently,　the　integrated　carbon　nitride　nickel　(Ni/MCNB)　heterogeneous　photocatalyst　demonstrates　high　effectiveness　in　diverse　photocatalytic　C-N　coupling　reactions　(21　examples,　up　to　93%　yield)　under　conditions　free　from　organic　ligands　and　additives,　which　shows　competent　performance　to　the　homogeneous　catalysts.　Moreover,　the　Ni/MCN-B　catalyst　demonstrates　remarkable　recyclability,　maintaining　its　photoredox　efficiency　after　10　cycles　with　minimal　loss　of　activity　and　a　diminished　metal　leaching　rate,　which　signifies　a　substantial　advancement　in　the　field　of　photocatalytic　system　design.