Abstract: In order to improve the traditional method for drying day-lily to realize large-scale, industrialized production, the processing technology by using orthogonal experiment for steaming treatment before dehydration and tunnel-type drying combined with industrial microwave drying production lines in drying process was studied in detail. The results showed that the optimum operating parameters for steaming treatment were as follows: temperature was 95℃, time was 60 s, for tunnel-type drying production line, the loadage was 5.0 kg/m2, hot air temperature was 85℃, wind speed was 1.5 m/s, and for industrial microwave drying production lines, material thickness was 15 mm, drying power was 16 kW, drying time was 90 s. The sensory quality, physical and chemical indicators as well as microbiological indicators of the final product dried day-lily, tested by Food Quality Supervision and Testing Centre, Ministry of Agriculture of China, reached the requirements of Standard NY5186-2002.