铅是一杆对人体有害的微量元素，可通过皮肤、粘膜、呼吸道与消化道进入人体，当环境中铅浓度增高时，可使人体铅吸收随之增加，从而造成对人体的全身性、多系统的影响．其中造血系统的反应最为敏感,头发错的检测可反映人体铅代谢的状况[1,2]。为了进一步探讨高发铅对小儿造血 Lead is a trace of trace elements harmful to the human body, through the skin, mucous membranes, respiratory tract and the digestive tract into the body, when the environment lead concentration increased, the body can lead absorption increases, resulting in the human body, more System impact. The hematopoietic system reaction is the most sensitive, the detection of hair wrong can reflect the status of human lead metabolism [1,2]. In order to further explore the high incidence of lead in children hematopoietic lead