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【目的】探讨不同年龄段支原体肺炎的临床特征。【方法】选择本院2012年1月至2014年12月收治的156例支原体肺炎（MP）患儿，根据年龄将其分为婴幼儿组（6个月至3岁）共69例（A 组），儿童组（3～14岁）87例（B 组），分析不同年龄段临床特征。【结果】A 组患者发热多为轻中度，肺部啰音阳性率高，胸片以小斑片状影为主；B 组患者发热多为中重度，肺部啰音阳性率较低，胸片以大片状影为主；两组白细胞（WBC）、C 反应蛋白（CRP）及中性粒细胞（NEU ）均升高，但 CRP 升高更显著（ P ＜0．05）。【结论】不同年龄组患者在胸片改变、临床症状及肺部啰音听诊方面差异较大；血常规对该病诊断缺乏特异性，但 C 反应蛋白对该病的诊断具有较大的意义；临床确诊需要根据综合情况进行分析以降低误诊率。“,”Objective] To investigate the clinical features of mycoplasmal pneumonia in children of differ‐ent ages .[Methods]A total of 156 cases of mycoplasma pneumonia (MP) in our hospital from January 2012 to December 2014 were selected and divided according to age into an infant group (6 months ~ 3 years old) with 69 cases (group A) and a children group (3 ~ 14 years old) with 87 cases (group B) .The clinical features of MP in these children of different ages were analyzed .[Results] In group A ,fever in patients was mild to mod‐erate ,the positive rate of pulmonary rales was high ,and the chest radiograph primarily showed small ,patchy shadows .In group B ,fever in patients was moderately severe ,the positive rate of pulmonary rales was low , and the chest radiograph primarily showed large shadows .In both groups ,white blood cells (WBC) ,c‐reactive protein (CRP) ,and neutrophils (NEU) were elevated ,although the increase in CRP was more significant ( P< 0 .05) .[Conclusion]The x‐rays ,clinical symptoms ,and pulmonary auscultations of patients of different ages were significantly different .Although blood tests for the diagnosis of MP lacks specificity ,c‐reactive protein has great significance in the diagnosis of the disease .Clinical diagnoses must be conducted according to the comprehensive situation analysis in order to reduce the misdiagnosis rate .