Objective: To investigate the treatment effect of the different surgery opportunity choice on the NEC disease. Methods: A retrospective analysis of our Hospital in recent 8 years, neonatal and pediatric surgery in the diagnosis and treatment of neonatal necrotizing enter colitis cases. According to the modified Bell stage, Bell stage IIB 44 cases were divided into two groups: immediate operation group and non-immediate operation group. The cases of non-immediate operation group were treated conservatively, and would get surgical treatment when they get worse. The survival children were followed up to 6 months. Clinical data were retrospectively analyzed, including the survival rate and the incidence of incomplete intestinal obstruction Results: About 50% of the Bell stage IIB cases developed into Bell stage III cases. The survival rate of the immediate operation group was obviously more than that of non-immediate operation group (87.5%vs57.1%) (P<0.05). And the incidence of incomplete intestinal obstruction of the immediate operation group was obviously less than that of non-immediate operation group (14.3%vs56.3%) (P<0.05). Conclusion: Early 1, NEC operation intervention can improve the survival rate of the NEC children obviously, and reduce the incidence of incomplete intestinal obstruction.