Abstract:To explore the optimal process conditions for brewing daylily beer,the optimal brewing parameters of daylily beer were obtained by response surface method optimization based on single factor experiment：Taking the decontaminated and desalinated tap water from the Bioengineering Experiment Center of Shanxi Datong University as the reference volume,the addition amounts of daylily and hops were 8 g/L and 0.40 g/L,respectively,while the fermentation temperature was maintained at 8 ℃.Under these conditions,the sensory score,original wort concentration,mass concentration of diacetyl,chromaticity,volume fraction of ethanol and volume percentage of total acids were 83.0,（11.80±0.04） °P,（0.12±0.02） mg/L,（17.20±0.06） EBC,（3.43±0.01）% vol,and（1.42±0.01） mL/100 mL,respectively.Both the physicochemical indicators and microbial safety indicators met the relevant national requirements and standards.