Recently, a 7-month-old child with sudden onset of paroxysmal crying did not attract enough attention from the parents, and was treated with fluids at a local clinic according to pediatric enterocolitis. The symptoms worsened after 2 days, and a large number of bloody stools appeared, which led to an urgent referral to our hospital, where he was diagnosed with acute intestinal intussusception with necrosis of a portion of intestinal tubes, and diffuse peritonitis. The diagnosis and treatment were delayed, and the necrotic bowel was removed by emergency surgical exploration. The parents regretted it. Combined with this case, once again to remind the parents — baby inexplicable crying do not be careless. If the child suddenly appears to cry loudly, limbs struggling, at the same time pale, sweating, and discharging jam-like blood stools (usually in the beginning of crying about 6-12 hours), parents must not be ignored, because the child is likely to suffer from intussusception. Acute intussusception is an acute intestinal obstruction caused by the intestinal tube and its corresponding mesentery being trapped into the neighboring intestinal tube. The incidence of this disease in China is higher than in Europe and the United States, men are higher than women, about 1.5-3:1. It occurs most often in 4 months to 2 years old, especially in 4 months to 10 months of obese children. Food change and food stimulation can cause intestinal dysfunction, therefore, when children change food or add food, they should gradually add complementary foods, and gradually transition when changing food, so that the intestinal tract can have an adaptation process, which can reduce the occurrence of acute intussusception. At the same time over-eating cold drinks is also easy to induce intussusception, because the intestinal wall of the child is thin, fixed intestines of the mesentery long and loose, can not be well fixed intestines; coupled with intestinal peristalsis is still irregular, itself is prone to intestinal peristalsis disorders; if the excessive intake of cold foods, can lead to intestinal smooth muscle spasm and intestinal peristalsis enhancement, thus pushing the small intestine into the large intestine, the formation of intussusception. In addition, gastrointestinal upper respiratory tract infection, mesenteric lymphadenitis and other diseases can also induce intussusception. If the child paroxysmal crying for more than 3 hours, for several consecutive days, diarrhea, colds, etc., should be timely to the hospital, so as not to delay the child’s condition, early detection of the problem, early diagnosis and treatment, more than 90% of the colonic intussusception can be successfully treated with air enema therapy, most of the small intestinal intussusception can be cured through dietary restraints, decongestive spasmodic, abdominal massage, and other conservative treatments, avoiding surgery, late diagnosis, or If conservative treatment fails, surgery is required.