目的:探讨胎龄小于32周早产儿解脲脲原体（UU）肺炎的临床特征。方法:回顾性分析北京大学第三医院新生儿重症监护病房2018年1月至2019年12月住院且合并肺炎的出生胎龄0.05］ 及出生体重［（1 282.03±292.49）g n vs （1 196.62±322.89）g，n t=1.34， n P>0.05］，差异无统计学意义。UU阳性组与UU阴性组相比，母亲单胎率（86.5% n vs 50%，χn 2=12.15）、绒毛膜羊膜炎发生率（10.8% n vs 1.55%，n χ2=4.61）、胎膜早破>12 h比例（32.4%n vs 11.8%，χn 2=5.37）及阴道分娩率（59.5% n vs 35.3%，n χ2=4.75）均较高（n P0.05）。n 结论:胎膜早破时间超过12 h、合并绒毛膜羊膜炎，经阴道分娩出生的小于32周的早产儿，UU感染风险增加。小于32周早产儿UU肺炎，可表现为用氧时间延长，白细胞计数升高，经过口服阿奇霉素治疗后，能够有效清除UU，改善预后。“,”Objective:To investigate the clinical characteristics of ureaplasma urealyticum(UU) pneumonia in preterm infants less than 32 weeks.Methods:Preterm infants with gestational age 0.05] and birth weight[(1 282.03±292.49)g n vs (1 196.62±322.89)g,n t=1.34, n P>0.05] between the two groups. In UU pneumonia group, the rate of singleton (86.5% n vs 50%,n χ2=12.15), chorioamnionitis (10.8% n vs 1.55%,n χ2=4.61), premature rupture of membranes>12 h (32.4%n vs 11.8%,n χ2=5.37) and vaginal delivery rate(59.5% n vs 35.3%,n χ2=4.75) were higher than UU negative group (n P0.05).n Conclusions:If premature rupture of membranes >12 h, combined with chorioamnionitis, and vaginal delivery, preterm infants less than 32 weeks are likely to have an increased risk of UU infection. UU pneumonia in preterm infants less than 32 weeks old was characterized by prolonged oxygen consumption and increased white blood cell count. Oral azithromycin treatment could effectively remove UU and improve prognosis.