Abstract: The lead in coals is both heavy metal and injurious trace element.It may be turned into the atmosphere, water and soil by weathering, burning and other factors, causing serious pollution of environment.This article discusses the geochemical characteristics, occurrence forms, migration modes and environment mechanism of the lead in coals in detail, using the methods of geochemistry, mineralogy, physical chemistry and environment chemistry to provide scientific foundation for environment protection and lead-off technology.