Abstract: Through the analysis of the chemical composition and physical properties of the silt of Yangtze River in Nantong, the requirements of the raw material which have been used to produce ceramsite have been discussed. The effects of ceramsite dosage and fly ash dosage on the performance of sediment ceramsite aerated concrete blocks have been analyzed. The compression strength and thermodynamic engineering performance of sediment ceramist aerated concrete blocks have been tested. The production technology of ceramsite and its aerated concrete blocks is introduced. According to the preparation status of ceramsite aerated concrete blocks, some suggestions have been put forward from the raw material, production technology and equipment.