Abstract: [Objective] The research aimed to optimize the optimum water-extracting technology of allergic rhinitis granule.[Method] Taking the yield of dry extract and paeoniflorin content as evaluation indices, the extraction technology of allergic rhinitis granule was studied by using L9（3^4）orthogonal experiment. [Result] The optimum extraction technology conditions were as follows：adding water with the amount 8 times as the amount of medicinal materials, decocting for 2.0 h for 3 times.[Conclusion] Water-extracting technology was simple,scientific, reasonable and feasible. The production cost could be reduced by using water-extracting technology. And the water-extracting technology could be applied in industrial production on the basis of ensuring the stable clinical curative effect of allergic rhinitis granule.