Abstract: The complete fluidic sprinkler was originally invented in China. Its design method has not yet fully grasped.Design method of the complete fluidic sprinkler was put forward firstly. An orthogonal array with four factors and three levels was selected to carry out the experiments. The optimum values of structure parameters were confirmed after the experiments. The influencing factors in decreasing order of importance for stepped frequency were contractive angle, water fetching angle, offset length and working area. The influencing factors for stepped angle were offset length, contractive angle, water fetching angle and working area in decreasing order of importance . The important structure parameters were confirmed as follow, the size of base circle was determined by the type of the sprinkler. Design method for water inlet and air inlet were the same. 14 and 30 degrees were defined for contractive angle and water fetching angle respectively. The equation of offset length and base circle relationship as well as the equation of working area and base circle were established using the method of quadratic regression analysis.