Diethyl Carbonate, with molecular formula C5H10O3 and structural formula ,is a fine solvent and textile auxiliary agent and widely used as ethylating, carbonating and carbonaylethoxylating reagents in organic synthesis and as solvents of nitro-cotton, cellulose ether, synthetic resin and natural resin. In the textile printing and dying industry, diethyl carbonate could make dyeing uniformity and increase fading assistance against sunshine, as solvent of resin, it is a nice solvent of polyamide, polyacrylonitrile and diphenol resin and can improve feel of the textiles and anti-crease quality in the synthetic fiber industry, used as paint remover, used to prepare the electrolyte in the capacitor cells and lithium cells. And in the pharmaceutical industry, Diethyl Carbonate is the basic ingredient of nard and used to synthesize intermediate Phenobarbital etc., thus has extensive market-developing prospect.