Abstract: Although metal-organic frameworks (MOF) possess a rich porous structure and have great potential in the field of supercapacitors, their inherent low electrical conductivity severely limits their practical use as electrode materials. To this end, by embedding MOF grains into the three-dimensional (3D) network of graphene (GE), and through the long-chain structure of the conjugated polymer polypyrrole (PPy), the MOF/PPy/GE ternary composite skeleton is constructed, which combines the 3D hierarchical porous properties and highly stable and efficient electrical conductivity. The results confirmed that cobalt-based MOFs doped with PPy in a small proportion can be more uniformly dispersed and embedded into the 3D lattice, thus synergizing the graphene nano-sheets with the PPy chain segments with excellent electrical conductivity to form a stable multilevel pore 3D network structure, effectively alleviating the stacking effect between the graphene layers. The electrochemical performance test data show that the prepared ternary composite electrode material displays excellent electrochemical energy storage capability, with a specific capacitance as high as 403.56 F/g, and maintains a capacitance stability of as high as 98.25% after 10 000 cycles, which fully reflects the excellent supercapacitance performance.