Objective To study the clinical effect of the repair of scar contracture deformity combined with functional rehabilitation training in the treatment of pediatric hand burn. Methods Twenty-six children with hand burns admitted to our hospital from January to December 2020 were selected for scar deformity repair and functional rehabilitation training. Three months after treatment, the range of motion (ROM), hand function and appearance satisfaction before and after treatment were compared. Results The excellent and good rate of ROM after treatment was 53.85%, which was higher than 11.54% before treatment, and the difference was statistically significant (P<0.05). The excellent and good rate of hand function after treatment was 50.00%, which was higher than 34.62% before treatment, but the difference was not statistically significant (P>0.05). The hand appearance satisfaction after treatment was 88.46%, which was higher than 69.23% before treatment, but the difference was not statistically significant (P>0.05). Conclusion The repair of scar contracture deformity combined with functional rehabilitation training can promote the recovery of hand function in children with hand burn and improve the appearance of hand, which is of application effectiveness.