Abstract: This paper reported the studied results oning funcoidan from the kelp Laminaria japonica Aresch. Theabstracting conditions were including 8 times of 0.1mol/L HCl for dissolvent and 2h to abstract. Afterward, 70% saturation degreeof ethanol was used to purify the crude funcoidan. The yeild rate was 2.1% of the raw kelp. The technological processes reportedwere mild and the products were provided with high security and bio-activity because of no harmful elements and chemicalspolluted.

Key words: Laminaria japonica, kelp process, funcoidan