This paper analyzes the disadvantages of the traditional water supply equipment,expounds the advantages and operation principle of the box-type non-negative pressure of water supply devices. Through the application in engineering practice,found the box-type non-negative pressure of water supply devices can meet the demand of large public buildings,and energy-saving effect is very significant,which can provide reference for similar projects.%分析了传统供水设备的不足，阐述了箱式无负压供水设备的优点及运行原理，通过在工程实际中的应用，发现箱式无负压供水设备能够满足大型公共建筑的用水需求，且节电效果非常显著，可为同类工程提供借鉴。
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