With Artemisia seed polysaccharide powder as raw material,3-chloro-2-hydroxypropyl-trimethyl ammonium chloride(HAT) as cationic ether and isopropanol as dispersant,cationic Artemisia seed polysaccharide is prepared with catalysis of alkali.Influences of alkalization temperature and time,etherification temperature and time,ratio of alkali to HAT as well as alcohol to distilled water to the final characteristics of cold water solubility and light transmittance of the final product are studied.When the ratio o...