Objective:To analyze the diagnostic value of serum procalcitonin (PCT) detection in children with bacterial upper respiratory tract infection. Methods:The serum PCT and C reactive protein (CRP) level, white blood cell (WBC) and sputum culture of 108 children with suspected bacterial upper respiratory tract infection that were treated in Qingdao Eighth People's Hospital from 2015.7 to 2017.5 were detected. The diagnostic value of serum PCT level,CRP and WBC for children with bacterial upper respiratory tract infection were analyzed by taking the results of sputum culture as gold standard. Results:Among 108 children, the sputum culture showed 72 children with bacterial upper respiratory tract infection. The serum PCT, CRP level and WBC of children with bacterial upper respiratory tract infection were all obviously higher than non bacterial upper respiratory tract infection (P<0.05). Taking the results of sputum culture as gold standard, the sensitivity, specificity, positive predictive value, negative predictive value and accuracy rate of serum PCT in diagnosis of bacterial upper respiratory tract infection were higher than CRP and WBC (P<0.05). Conclusions:The serum PCT detection has higher diagnostic value for children with bacterial upper respiratory tract infection, and has higher diagnostic sensitivity and specificity than CRP and WBC.