This work was designed to determine the optimum extraction conditions for imporving the quality of Eucommia ulmoidesl leaf-tea. Soluble solid content was 27.7% in the tea extracted at 99.3$^{circ}C$(extraction temperature) and 67.8 min(extraction time) which were maximum points by the ridge analysis. The extraction conditions for the maximum organoleptic scores were 72.9$^{circ}C$ and 59.6 min in color, 80.$0^{circ}C$ and 90.0 min in aroma, 77.8$^{circ}C$ and 55.5 min in aftertaste, and 77.9$^{circ}C$ and 53.1 min in overall palatability. The extraction conditions for the minimum organoleptic scores were 77.8$^{circ}C$ and 52.7 min in astringent taste, and 75.1$^{circ}C$ and 49.4 min in Chinese medicine taste. The optimum ranges of the conditions based on soluble solid content and overall palatability of the tea wre 75~83$^{circ}C$ and 55~65 min. The soluble solid content and overall palatability predicted at ooptimum condition(78$^{circ}C$ and 60 min) werw similar to experimental values.