1. Ensure normal fiber intake, fluid intake and exercise. 2.The routine use of prebiotics or probiotics is not recommended for children with constipation. 3. Intensive behavioral therapy based on traditional treatment methods is not recommended. 4.According to expert opinion, toilet training is recommended for constipated children over 4 years of age to be explained and guided. 5. Other biofeedback treatments are not recommended. 6. Multidisciplinary treatment or alternative therapies are not recommended for routine use. 7. First-line treatment for children with fecal impaction: polyethylene glycol electrolyte (Fosamax, hereinafter referred to as PEG) orally, 1.5g/(kg?d), for 3-6 days. If PEG is ineffective, children with fecal impaction can be treated with enemas once daily for 3-6 days. 9, PEG can be used as first-line maintenance therapy. Starting dose for first-line maintenance therapy. The starting dose is 0.4g/(kg?d), and the dose is adjusted according to the clinical manifestations. 10.Children treated with PEG do not require enema therapy. If PEG is ineffective, lactulose can be used as first-line maintenance therapy. 12, experts recommend that supplemental or second-line treatment can be milk of magnesia, mineral oil and stimulating laxatives. 13.Maintenance therapy should be continued for at least 2 months. Treatment can only be stopped after all symptoms of constipation have been relieved for at least one month. 14. During toilet training, the medication can be stopped only once if the training is effective. 15. Routine use of Rubiprostone, Linaclotide and Procalcitonin is not recommended for children with persistent constipation. 16, persistent constipation in children with feasible paracolic enema examination. 17, Routine use of TNS (transcutaneous electrical nerve stimulation) is not recommended for children with persistent constipation. This evidence-based guideline standardizes the evaluation and treatment of children with functional constipation, while also focusing on improving their quality of life. In addition, special evidence-based approaches should be used for children under 6 months of age and for older infants and children, respectively. This guideline can be used as a basis for routine diagnosis and treatment as well as for more clinical research. Further research is needed to better assess the diagnosis and treatment of functional constipation in infants and children.