消防泵主备用的切换是保证消防备用泵运行的必要条件。其切换方法的关键是控制信号的选择。本文通过两种消防泵主备用切换方法的比较、分析 ,提出了在消防给水系统中采用压力信号控制的方法要优于电流信号的方法 ,并建议消防泵的主备用切换采用压力信号控制方法。 Fire pump standby switch is to ensure that standby fire pump operation necessary conditions. The key to its switching method is the choice of control signal. In this paper, comparing the two main methods of switching between fire pump and standby, this paper puts forward the method that the pressure signal control method is better than the current signal in the fire water supply system and the pressure signal control method is suggested.