Abstract: This study was conducted to determine the best harvest time for Liriope muscari(Decne.) Baily.Using the drying rate as an index,the yield of L.muscari(Decne.) Baily was determined every 15 days.The polysaccharide content was measured by using phenol sulfuric acid method.The result showed that the yield and total polysaccharide content in the tubers of L.muscari(Decne.) Baily were at their highest levels in mid-May.Therefore,it was recommended as the optimum harvest time.