Synthesis method of soybean phospholipid ethoxylate

The invention relates to a synthesis method of soybean phospholipid ethoxylate. The synthesis method comprises the following steps: in the presence of a catalyst, with a mixture containing soybean phospholipid and fatty alcohol as a starting agent, performing ring-opening polymerization on oxirane to obtain the soybean phospholipid ethoxylate. The synthesis method is simple in process; the obtained soybean phospholipid ethoxylate has the advantages of good emulsification and dispersion; the synthesis method can be applied to industrial production of the soybean phospholipid ethoxylate.