In the industrial field, PCBA (printed circuit board components) have long faced complex environmental erosion such as humidity, dust, and chemical corrosion. Traditional three proof treatment techniques have gradually shown problems such as short protection time and insufficient compatibility when dealing with extreme working conditions, making it difficult to meet the reliability and long life cycle development needs of industrial equipment today. The new process of industrial PCBA three proof treatment provides a key to the stable operation of industrial electronic equipment through technological innovation and optimization of the protection system.