The pelvic bone fractures in children were uncommon, except for avulsion injuries in the literature and authors had 21 cases of children's pelvic bone fracture, ranging from 1 to 15 years. The mode of injury, type of fracture, associated injuries, morbidity and mortality, and out-come were retrospectively analyzed. The majority of injuries were from automobile-pedestrian collisions (81.0%). the Torode and Zieg type IV injury had the greatest morbidity, mortality, and complications. sixteen patients had non-orthopedic, associated injuries and fourteen required blood transfusions within initial 48 hours after injury. Two of them passed away due to hematologic unstableness. Twenty patients were managed by conservative method, except for one operative case by using of an external fixation device. This study included only 13 cases had average 1 year of follow-up. One acetabular dysplasia of 5 acetabular fractures was found at 12 months after injury. The nonoperative approach for the pelvic bone injury has had a satisfactory outcome in our hospital. so, authors think that if conservative methods will be properly applied, it may be one of the methods of treatment for the children's pelvic bone fracture. Even though there is no symptoms, long-term follow-up will be inevitable for checking more severe acetabular dysplasia and leg length discrepancy.