目的：研究儿童脑电图的发育。方法：对２２９例４～１２岁正常儿童脑电活动进行计算机分析，统计出该年龄段脑电活动及其快慢频段比的正常参考值。结果：４岁时额部以δ为主，１２岁时以α为主；中央区４岁时以δ为主，８岁时以α为主；顶部４岁时以δ为主，６岁开始以α为主。枕部４～１２岁均以α为主，α能量逐年增高。颞部４岁时以δ为主，８～９岁时以α为主。结论：儿童脑电发育随年龄增长，δ能量百分率减少，α能量百分率增加 Objective: To study the development of EEG in children. Methods: A total of 229 normal children aged 4 to 12 years were analyzed by computer. The normal reference values ​​of EEG activity and frequency ratio were calculated. Results: At the age of 4, the forehead was predominated by δ, while α was the main body at 12 years old. The central region was dominated by δ at the age of 4 years old, while the main was α at the age of 8 years old. Mainly α. Occipital occipital 4 to 12-year-old are mainly alpha energy increased year by year. Temporal 4-year-old to δ-based, 8 to 9 years old to α-based. Conclusion: With the increase of age, the percentage of δ energy decreased and the percentage of α energy increased