在能源危机的冲击下，节能已成为广大喷灌工作者共同关心的问题。降低喷灌系统工作压力是节能的主要方法之一，而喷头的工作压力与喷灌系统工作压力紧密相关。本文提出了固定式喷灌系统喷头经济压力的概念及其确定方法，并将此法运用到实例中。在选择经济、合理的喷头及其经济工作压力方面做了有意义的探讨。 Under the impact of the energy crisis, energy conservation has become a common concern of the majority of sprinkler workers. Reducing the working pressure of sprinkler system is one of the main methods of energy saving, and the working pressure of sprinkler is closely related to the working pressure of sprinkler system. In this paper, the concept of the economic pressure on the nozzle of a fixed sprinkler system and its determination method are put forward, and the method is applied to the examples. In the choice of economic and reasonable nozzle and its economic work pressure has made a meaningful discussion.