The invention discloses a method of preparation of flexible cobalt zinc oxide nanowire material. Firstly a layer of zinc-base nano-substrate is grown on carbon cloth, and zinc salt, cobalt salt and a replenishing agent are mingled with water, hydrothermal reaction is conducted on the grown layer of zinc-base nano-substrate of the carbon cloth, and the reaction of hydrothermal reaction is at 120-180 DEG C for 5-12 hours, and the process of filtering, washing and drying is passed, the flexible cobalt zinc oxide nanowire material is obtained; the replenishing agent is ammonium fluoride and urea. The method of preparation of flexible cobalt zinc oxide nanowire material is low in energy consumption, easily accessible in raw material, simple in operation, and easy to achieve, the prepared linear ZnCo2O4 nano-material is provided with porous microstructure, the electronic transmission path is shorter, and the capacitance of the electrode material is effectively increased. In addition, the carbon cloth is used as substrate, the electrode material is provided with toughness, and is applicable to wearable devices. At the same time current energy reserve topic is provided with good material, and great application prospect is provided.