Water-based printed circuit board (PCB) cleaning agent and preparation method thereof

The invention provides a water-based printed circuit board (PCB) cleaning agent. The cleaning agent is prepared from the following raw materials in parts by weight: 2-3 parts of sodium borate, 1-2 parts of potassium pyrophosphate, 3-4 parts of coconut oil alkylolamide phosphate, 4-5 parts of fatty alcohol-polyoxyethylene ether, 2-3 parts of citric acid, 30-40 parts of ethanol, 4-5 parts of auxiliary and 100-120 parts of deionized water. The cleaning agent has the beneficial effects that the cleaning agent has the capability of quickly removing rosin, soldering tin, metal ions, fingerprints and the like, can not cause short circuits easily, is less in loss, ensures better printing quality, reduces the cost and saves time, thus greatly reducing the rejection rate and manufacturing more PCBs with better quality more quickly; the auxiliary can form a protective film on the surface of the circuit board to isolate air to prevent water and other molecules in the air from corroding the circuit board; the cleaning agent is resistant to oxidation and is convenient for operation of the next preparation process.