The light mineral in 124 bottom-surface sediment samples from the Changjiang (Yangtze )River and the East China Sea was studied. The 0.1-0.25 mm fraction was analyzed. The light mineral was studied with staining and immersion methods. The light mineral of the area investigated is made up of quartz, plagioclase, orthoclase, muscovite, chlorite, calcite, volcanic glass and glauconite. The area investigated may be divided into 3 mineral provinces on the basis of the light mineral composition:1)the western mineral province of muscovite, chlorite and calcite; 2)the middle mineral province of orthoclase and glauconite; and 3) the Okinawa Trough mineral province of volcanic glass. The results of our study show that the materials of the modern Changjiang (Yangtze) River are transported as far east as about 122°30′E off the mouth of: the Changjiang (Yangtze) River. When these materials are transported south along the coast, they are dispersed slowly as far east as about 123°E.