A　feasible　strategy　for　the　in　situ　growth　of　two-dimensional　(2D)　[Ni-3(OH)(2)(1,4-BDC)(2)-(H2O)(4)]center　dot　2H(2)O　(Ni-BDC;　1,4-BDC　=　1,4-benzenedicarboxylate)　and　the　subsequent　partial　sulfurization　treatment　for　the　decoration　of　nickle　sulfide　(NiS)　is　developed.　The　fabricated　hierarchically　structured　Ni-BDC@NiS　as　a　synergistic　electrocatalyst　shows　extremely　high　activity　toward　the　oxygen　evolution　reaction　(OER).　The　optimal　Ni-BDC@NiS　catalyst　acquires　a　current　density　of　20　mA　cm(-2)　at　a　lower　overpotential　of　330　mV　and　low　Tafel　slope　of　62　mV　dec(-1),　outperforming　most　previously　reported　Ni-based　sulfide　catalysts.　Clearly,　the　combination　of　the　NiS　and　Ni-BDC　array　contributed　to　the　improvement　of　electron　transfer,　promotion　of　water　adsorption,　and　increase　of　rich　active　species.　In　addition,　the　in　situ　created　hierarchical　structure　not　only　affords　feasible　access　for　mass　transport　but　also　strengthens　structural　integrity,　contributing　to　efficient　and　stable　OER　performance.　This　general　and　effective　strategy　anchoring　conductive　active　species　on　a　porous　metal-organic　framework　(MOF)　thus　provides　an　efficient　way　to　fabricate　synergistic　electrocatalysts　for　the　OER.