Calcium acetate and soda ash undergo double decomposition reaction to change into sodium acetate, the reaction solution is concentrated to 26℃, decolorized with activated carbon, then cooled and crystallized, and the finished product is obtained by centrifugal separation. When anhydrous sodium acetate is needed, the crystallized sodium acetate is re-melted, vacuum filtered, the mother liquid crystal is placed in a stainless steel tank for cooling, then centrifuged, filtered, and dried, and then the crystal is dehydrated and dried by electric heating to obtain anhydrous products. Acetic acid and caustic soda can also be directly reacted to produce sodium acetate.