Objective To analyze characteristics and related factors of accidental injuries among children under the age of 7. Method Retrospective study was used in analyzing 488 accidental injury cases of children under the age of 7 in Conghua City from January to December in 2012. Results The main causes of children's unintentional injuries were as follows:falls, animal injuries, burn and scald, blunt force injuries, road traffic injuries and the foreign body injuries, there were significant differences between sexes and different age groups(P＜0.01).Boys animal damage ratio was higher than girls (P＜0.01), girls burn proportion was higher than boys (P＜0.05);Among children aged 3~7, the proportion of road traffic injuries was higher than those aged 0~2 years old (P＜0.01), but the proportion of foreign body injuries was lower than those aged 0~2 (P＜0.01).For the children cared by the teachers in the kindergarten, the higher percentage of moderately severe accident occurred. Conclusions In the children's accident harm, the incidence of animal damage is higher, elder children are prone to road traffic injury and younger children prone to foreign body injuries, and collective children is the key of accident prevention, so it should be taken a targeted interventions according to the characteristics of children accidental injuries.