Objective  To investigate the incidence and influencing factors of child injury in schools for migrant worker's children (MWC) in Qingpu District of Shanghai.

Method  All students of grade 3, 4 and 5 from four schools for MWC were selected through cluster random sampling in Qingpu District in Shanghai. Questionnaire was used to gather information from January 2015 to January 2016. There were 1 271 questionnaires distributed and 1 254 valid questionnaires returned (98.66%).

Result  The incidence rate of injuries among students was 39.00% in the selected schools. The results of Spearman rank correlation analysis showed that the educational level of guardians (r_s=-0.089), children's intercourse ability with classmates (r_s=-0.067), academic performance of children (r_s=-0.082), and KAP scores of guardians (r_s=-0.072), and gender (r_s=-0.062) were negatively correlated with child injury incidence, and the differences were statistically significant (P<0.05). The number of children in a family (r_s=0.074) and the character of children (r_s=0.076) were positively correlated with child injury incidence, and the difference were statistically significant (P<0.05). The results of logistic regression analysis showed that the protective factors for child injury were guardians with a higher educational level (OR=0.863), children's difficulty in getting along with classmates (OR=0.731), children's better academic performance (OR=0.737), and girl (OR=0.767), and the differences were statistically significant (P<0.05); besides, the risk factors were multiple children in a family (OR=1.234) and extroverted children (OR=1.257), and the differences were statistically significant (P<0.05).

Conclusion  A high incidence rate of child injury is identified in the students of schools for MWC in Qingpu District of Shanghai. Positive interventions should be carried out to reduce the incidence of child injury and relieve economic burden and life stress of migrant workers.