Abstract: During the diagnosis and treatment of constipation in children, Professor Qin Yanhong adhere to the etiology and pathogenesis, who combines the clinical observation results with the experience of experts throughout in the differentiated treatment. The differentiation is clear, comprehensive and flexible. Professor Qin Yanhong thinks that constipation in children is mainly in the type of intestinal dryness and fluid deficiency, so she has make Zengshui Xingzhou decoction. Meanwhile, she deals with the disease based on the root causes and manages both the symptoms and causes, paying attention to nursing and regulation. The method of relaxing bowel has been used throughout the treatment process. All of these have achieved significant effect in the treatment of children with constipation and in the prevention of its relapse

Key words: Constipation, Intestinal dryness and fluid deficiency, Qin Yanhong, Clinical experience, Children