eased on methods for preparing phospholipids from other organisms and tissues, the appropriate method for silkworm egg is achieved through optimizing the extractive solution volume, extractive time and times etc. The amount of phospholipids is measured by phosphorus molybdenum calorimetry and the compositions are analyzed by TLC (Thin Layer Chromatography,ThC). This thesis is studied on variations of silkworm, tussah-silkworm and en-silkworm eggs phospholipids and experimental fluorisis larvae phospholipids...