Abstract: In recent years, with the rapid growth of flexible load in distribution network, the problems of low voltage and seasonal overload at the end of distribution lines in distribution network are often caused. If the solution of traditional infrastructure investment transformation is adopted, not only the fixed asset investment is large, the construction cycle is long, but also the asset utilization efficiency is low. This paper proposes a power quality management scheme based on distributed electrochemical energy storage system, which can make up for the shortcomings of traditional schemes and effectively solve the phased power quality problems of distribution networks.