A normal person’s face is slightly yellowish with redness, full of spirit, natural expression, and slightly shiny. A grayish complexion is common in chronic hepatitis and lead poisoning. Usually in Chinese medicine, a dark and lusterless face is a symptom of weak lung qi. If cold qi and blood pass up through the meridians and are injected into the face and manifested, the strength, weakness and good operation of qi and blood will definitely be seen in the face color. The gray color of the face caused by lead poisoning is very common, especially in the children’s group. With the increasing prevalence of lead poisoning nowadays, many people have become concerned about lead poisoning disease and must take preventive measures. The supplementation of vitamin b1, b2, b6, b12 and folic acid is also effective in improving the symptoms and promoting the recovery of physiological functions. Preventive measures for gray face caused by lead poisoning: 1. Improve the production conditions and reduce the concentration of lead in the air: Production equipment should be mechanized and automated to minimize the exposure to lead dust and lead fumes, places where lead dust and lead fumes are generated should be sealed and ventilation devices should be installed to control the temperature of molten lead to reduce the generation of lead fumes, processes with a lot of lead dust can adopt wet work, carry out technical innovation and use non-toxic substances In place of lead, such as titanium white instead of lead white in paint, and iron red instead of lead, etc. Adopt various technical measures to reduce the concentration of lead in the air, and conduct regular testing, so that the concentration of lead in the air of the workshop is not the highest permissible concentration, lead smoke 0.03mg/m3, lead dust 0.05mg/m3. 2.Strengthen workers’ individual protection and medical supervision: Lead operation workers should wear overalls and filtered lead masks when working, no overalls into the canteen, dormitory, washing hands before work and meals, no smoking in the workshop, eating, regular workers’ health supervision. 3.Avoid accidental ingestion of excessive lead compounds: Prevent consumption of lead-contaminated food and drinks, and use of lead-containing drugs should be strictly controlled in dose and not in excess.