Preparation method of aluminum etching liquid

The invention relates to the technical field of aluminum etching liquid preparation, and discloses an aluminum etching liquid preparation method which comprises the following steps: S1, material preparation: preparing phosphoric acid, nitric acid, acetic acid, amino acid, inorganic salt, imidazole carboxylic acid and deionized water; s2, mixing: starting a motor, and uniformly stirring the solution through a stirring assembly; s3, heating: heating the solution by a heating coil and a heating wire during stirring; s4, filtering: conveying the mixed solution into a filter tank for filtering; according to the preparation method of the aluminum etching liquid, the multiple feeding pipelines are arranged above the reaction kettle, preparation raw materials of the aluminum etching liquid can be separately fed, the situation that part of components of the aluminum etching liquid are subjected to chemical reaction in advance in the pipelines is avoided, and when the raw materials are fed, the feeding amount can be de