报道54例正常小儿24小时动态心电图（DCG）。年龄3～13岁。心率范围45～197次／分，均为昼夜型。全组均有窦速，大部份有窦级（76％），部份有窦律不齐、窦停博、窦房阻滞和Ⅰ度房室阻滞。全组发现室上性早搏27例（50％），室性早搏6例（11％），均为单源单发性，早搏总次数两者均＜10次／24h。本文对小儿DCG的诊断标准提出了初步建议。 Reported 54 cases of normal children 24 hours dynamic electrocardiogram (DCG). Age 3 to 13 years old. Heart rate range 45 ~ 197 times / min, are day and night type. All patients had sinus speed, most of them had sinus level (76%), some had irregular sinus rhythm, sinus arrest, sinoatrial block and degree of atrioventricular block. The whole group found that 27 cases (50%) of supraventricular premature beats and 6 cases (11%) of premature ventricular contractions were single source and the total number of premature beats was <10 times / 24h. This article presents a preliminary diagnosis of pediatric DCG diagnostic criteria.