Objective　To explore the role of temporary cardiac pacing in severe hemodynamic disorders caused by bradyarrhythmia in children. Method　The clinical data of 3 children with severe hemodynamic disorder caused by bradyarrhythmia treated with temporary cardiac pacing were retrospectively analyzed. Results　Three children, one 12-yearold boy and two 5-year-old girls, were treated with drugs first, but the condition continued to deteriorate. Temporary cardiac pacemakers were installed within 10 hours after admission, and the hemodynamic was quickly improved. The temporary pacemakers were removed 10 days in two boys and 11 days in one girl after operation. The prognosis was all good in short-term follow-up. The family members of a girl abandoned treatment 21 days after surgery. The girl survived but was found to have cardiac dysfunction at one-year follow-up. Conclusion　When the hemodynamic disorder is caused by serious bradyarrhythmia, the temporary cardiac pacing device is effective.