By using several solvents, barley extracts containing the anticomplementary activities in classical pathway were prepared (250 $mu extrm{g}$/ml): methanol (83.1%), ethanol (71.9%), water extract (25.4%), M-1 (250 $mu extrm{g}$/ml), and the soluble part of methanol extract which showed the highest activity (83.4%) and the yield. Anticomplementary activity of methanol extract as well as protease digestion in classical pathway showed 82.4% and 78.4% in the concentration of 250 $mu extrm{g}$/ml, respectively. It was found that protein was not involved in anticomplementary activity in the classical pathway and the methanol extract made an impact on classical pathway, but not on alternative pathway. For the immune-stimulating effect, the T cell proliferation effect of the protease digestion displayed little effect irrespective of the dose. In addition, the T cell proliferation effect of methanol extract showed 13-fold higher proliferation effect compared with positive control. It was revealed that the substance containing protein serves as an important factor for the immune proliferation. Therefore, the anticomplementary activity ${eta}$-glucan in classical pathway and alternative pathway displayed the lowest activity, showing 2.2%, 22.3% respectively. However, the immune-stimulating effect of ${eta}$-glucan showed the T cell stimulating effect 13 times higher than positive control.