Method for preparing polylactic acid polyalcohol

The invention discloses a catalyst for preparing polylactic acid polyalcohol. A lactide monomer and initiator alcohol are used as raw materials, under the action of the catalyst, a reaction is performed to obtain the polylactic acid polyalcohol, the catalyst is singly used as one of neodymium neocaprate and lanthanum neocaprate, and the initiator alcohol is singly used as one of neopentyl glycol,diethylene glycol, 1,4-butanediol, 1,6-hexanediol, trimethylol propane, pentaerythritol, ethanediol and the like, and the consumption is regulated according to the size of required product molecular weight. 本发明公开种制备聚乳酸多元醇的催化剂，是以丙交酯单体及起始剂醇作为原料，在催化剂的作用下进行反应，得到聚乳酸多元醇，催化剂为新葵酸钕、新葵酸镧中的种单独使用，起始剂醇是指新戊二醇、二乙二醇、1，4-丁二醇、1，6-己二醇、三羟甲基丙烷、季戊四醇、乙二醇等中的种单独使用，其用量根据所需产品分子量的大小来调节。