After electronic products are scrapped, lead in PCB solder is easily dissolved in oxygen-containing water. Pollution of water sources and environmental damage. Solubility makes it accumulate in the human body, damaging the meridian, leading to dull, high blood pressure, anemia, reproductive dysfunction and other diseases; Excessive concentration may cause cancer. Cherish life, the times require lead-free products. As an important link in PCB manufacturing, soldering must be lead-free, so lead-free soldering platform came into being.