Abstract: With phosphate wastewater from the production of α-acetyl-γ-butyrolactone as raw material， through the composition analysis of phosphate wastewater， pH adjustment， dehydration， and polymerization， the  phosphate in the wastewater was converted into sodium dihydrogen phosphate， disodium phosphate， trisodium phosphate， sodium acid pyrophosphate， sodium pyrophosphate， sodium trimetaphosphate， sodium hexametaphosphate， and sodium tripolyphosphate. The indexes of the prepared phosphate products were analyzed and the results showed all of them met the requirements of corresponding industrial phosphate standards. This method not only improves the industrial productivity effect， but also achieves the purpose of environmental protection，energy saving-and-emission reduction，and waste recovery.

Key words: sodium phosphate； wastewater； &alpha, -acetyl-&gamma, -butyrolactone