Inclusion criteria:  4-14 years old; Roman IV criteria for childhood constipation; After a course of PEG and a course of Chinese medicine treatment was ineffective; Barium enema showing fecal impaction.  Exclusion criteria:  Congenital and/or acquired intestinal diseases, such as congenital megacolon, intestinal stenosis, polyps, Crohn's disease, tuberculosis, inflammation, and tumors; Anorectal diseases, such as anal atresia, fistula, abscess, and tumor; Neurological diseases, such as brain and spinal cord diseases; genetic metabolic diseases; psychosocial and behavioral diseases; other systemic diseases; Refused to participate in.