Abstract: Single factor test and orthogonal test were performed to extract polysaccharides from extract cactus juice, and the polysaccharides extracted were prepared to polysaccharides capsules. The experimental results showed that 5 times concen-trated cactus juice, a mixture of ethanol-cactus juice(1:3)and temperature of -18℃ were optimal for highest yield. The method of preparing polysaccharides capsules were as follows: 6 %～8 % HPMC were dissolved into 60% ethanol as coating fluid, coating at 35～40℃, filling the capsules after drying for 2h.

Key words: concentrated cactus juice, polysaccharide, extracting technique, capsule, peraparation