[目的]为解决高速水稻工厂化育秧流水线喷淋装置存在喷淋均匀性差、稳定性较低，导致药水浪费等问题，设计了一种喷淋装置。[方法]通过对喷淋过程分析，确定了关键部位及工作参数；利用Fluent流体仿真，对几种不同的喷淋管路结构进行了研究。以喷淋孔与水平夹角、喷淋孔孔径、喷淋管高度为试验因素，以克里斯琴森均匀系数Cu和变异系数Cv为评价指标，进行喷淋台架单因素和三因素三水平响应面试验。[结果]：各因素对喷淋均匀性和稳定性影响的主次顺序为喷淋管孔径大小、喷淋孔与水平夹角大小和喷淋管高度，通过极值分析和方差分析，得到最优参数组合为喷淋孔与水平之间的夹角大小为60°，喷淋孔孔径大小为1.27 mm，喷淋管高度为29.8 mm，在该条件下喷淋均匀系数为95.189%，变异系数为5.988%。[结论]研究结果可为水稻工厂化育秧流水线喷淋装置的优化设计提供参考。

[Objective]In order to solve the problems of poor spray uniformity and low stability of the spraying device of high -speed rice industrial seedling raising assembly line， which led to the waste of chemicals and water， a spraying device was designed. [Method] Through the analysis of the spraying process， the key parts and working parameters were determined; using Fluent fluid simulation， several different spray pipeline structures were studied. The single-factor and three-factor three-level response surface tests of the sprinkler pedestal were carried out using the angle between the sprinkler holes and the horizontal plane， the aperture diameter of the sprinkler holes， and the height of the sprinkler pipe as the test factors， and the Christensen's coefficient of uniformity， Cu， and the coefficient of variation， Cv， as the evaluation indexes.[Results]:The results showed that the order of the influence of each factor on the spray uniformity and stability is ranked as the size of the spray pipe aperture， the size of the spray hole and the horizontal angle size and the height of the spray pipe; through the extreme value analysis and ANOVA， the optimal parameter combination is obtained as the size of the angle between the spray hole and the level of 60°， the size of the spray hole of 1.27 mm， and the height of the spray pipe of 29.8 mm， then the uniformity coefficient of the spray is 95.189%， and the coefficient of variation 5.988%. [Conclusion]The results of the study can provide a reference for the optimal design of the spraying device in the rice factory seedling production line.