The invention provides an all-solid flexible micro super capacitor based on a GQD/Co(OH)2 composite material. The positive electrode of the all-solid flexible micro super capacitor is prepared from a GQD/Co(OH)2 composite material. The GQD/Co(OH)2 composite material is prepared according to the steps as follows: evenly mixing the aqueous solution of GQD (Graphene Quantum Dot) powder, Co(NO3)<2>.6H2O, KCl and water; and getting the GQD/Co(OH)2 composite material through galvanostatic deposition with the mixed solution as electrolyte and nanoporous gold wires as working electrodes. The all-solid flexible micro super capacitor based on a GQD/Co(OH)2 composite material provided by the invention has good conductivity and high energy density, and the capacity thereof is easy to control.