This paper deals with the preparation of the carrsgeenan from some species ogenus Euchemu, they ar. gedatzvaae, E. cottoz and E. okamerai collected inIl=ai_uan. Tsland, Cbna. The properties of carrageenan produced were also studied. the prepar.tion, extraction in w ester afforded the highest yield, and thosepretreated with concentrated NaI3 and then oxtract.ed by Zatengave the lowest yield.4Thile the gel strength of carrageenan extracted ixz water with NaOH were theowcst and those egtractedwith 0.1-2.0% CaO had no significant effect on thgelstren. The gel that extracted by 2 NaOH had the strength 3--5 times higher thanthextracted in water. The maximum gal sirens of carrageenan ohtainod bypretreating with concentrated. NaOH(E. geaiirre 346--385 g/cm²,E. cottora 498-521.g/cm^-2, E. okamal 520g/cm²), The sulfate and 3, 6-AG content.s of ca.rrageenan were :10.2-18.9% and 21.0%31.2% from E. gelatcae 13.2-23.0% and 21.6--33.6% from E. cottoaiz and. 13.7-24.3% and 22.2-33.9%from E, okamura, respectively. The above results show that E. geLrctiaae, E. eottrnazi anal E. okamura grownHaixzan Tsland in China hold great promise as rav materials for K-carrageenan production