In high pressure atomizing spray equipment, the water quality of the water source is very important. Poor water quality of the water source may lead to mechanical failure, reduce the service life of the equipment and even endanger people. Therefore, before using high pressure atomizing spray equipment, the water quality of the water source should be tested and evaluated to ensure its suitability. In this paper, we will discuss how to determine the water quality of high-pressure atomizing spray equipment is appropriate.