Electrolyte spraying device for scanning type micro-arc oxidation

The utility model discloses an electrolyte injection device for scanning micro-arc oxidation (SMAO). The electrolyte injection device comprises a liquid injection pipe, a liquid storage pipe, a liquid discharge pipe, a liquid injection pipe fixing device, a metal sheet, a power supply connecting wire and a mesh electrode, the liquid spraying pipe is fixed in the liquid storage pipe through the liquid spraying pipe fixing and connecting device; the liquid discharge pipe is fixedly connected with the liquid storage side wall and is communicated with the liquid storage pipe; and the metal sheet, the power supply connecting wire and the mesh electrode are positioned in the liquid spraying pipe. No matter the device sprays the electrolyte upwards or downwards, the electrolyte can be discharged after being filled between the two electrodes by adjusting the height of the water outlet of the liquid discharge pipe, so that a stable electrolyte layer is formed; the problem that an electrolyte layer between two electrod