Abstract: The hydroxyl–alkyl and cationic esterification modification of guar gum is introduced. Research is focused on grafted copolymerization of guar gum with various ethylene monomers such as acrylamide，acrylonitrile，etc. The optimum parameters，such as grating ratio，efficiency etc. are listed. Guar gum derivatives are used as retention and drainage aids，as well as dry strength agent in the papermaking industry. The potential application in the future is pointed out.

摘要： 介绍了瓜儿胶的羟烷基及阳离子醚化改性技术，瓜儿胶与丙烯酰胺、丙烯氰等乙烯基单体的接枝共聚改性，总结了各种引发体系下接枝率，接枝效率等指标的优化条件。论述了瓜儿胶衍生物在造纸湿部作为助留助滤剂、增强剂的应用，并指出今后的发展前景。