Objiective To investigate the value of lung ultrasound in early diagnosis and monitoring of transient tachypnea of the neonate. Methods Sixty children with transient tachypnea admitted to Huaian Maternity and Child Healthcare Hospital Affiliated to Yangzhou University Medical College from July 2018 to June 2019 were selected as the observation group, and sixty healthy newborns with similar gestational age were selected as the control group. In the observation group, lung ultrasound was performed within 6 h and 72 h after birth, respectively, while in the control group, lung ultrasound was performed only within 6 h after birth, the characteristics of lung ultrasound were analyzed.Results Ultrasound examination showed that no consolidation occurred in all the children. Within 6 h after birth, the incidence of abnormal pleural line, disappearance of A-line, existence of B-line, alveolar interstitial syndrome, double lung spot and pleural effusion in the observation group was higher than that in the control group, the differences were statistically significant (P＜0.05). The incidence of abnormal pleural line, disappearance of A-line, existence of B-line,alveolar interstitial syndrome, double lung spot and pleural effusion in the observation group 72 h after birth was lower than that of ultrasound examination within 6 h after birth, the differences were statistically significant (P＜0.05). Conclusion Children with temporary dyspnea were characterized by abnormal pleural line, disappearance of A-line, presence of B-line, alveolar interstitial syndrome, double lung spots, no consolidation and pleural effusion. Pulmonary ultrasound is of great value in early diagnosis and monitoring of temporary dyspnea in neonates.