Aluminum cleaning agent and preparation method thereof

The invention discloses an aluminum cleaning agent. The aluminum cleaning agent consists of the following raw materials in percentage by weight: 2-6% of potassium hydroxide, 2-10% of propanediol butyl ether, 1-5% of sodium metasilicate, 1-5% of boric acid, 1-7% of sodium polyacrylate, 1-5% of d-sorbitol solution, 0.4-1.2% of sodium chloride, 0.1-0.5% of dimethyl siloxane, 1-8% of anion surface active agent, 1-8% of nonion surface active agent, and the balance of water. The aluminum cleaning agent contains no such substances as phosphate and heavy metals harmful to human bodies and environments, is free of environmental pollution, is safe and reliable in use, is higher in cleaning efficiency, reaches the cleaning efficiency of 99%, meanwhile, is better in rust and corrosion resistance, is bright and smooth in cleaned aluminum workpieces, and is free of damaging the workpieces.