Abstract: In order to investigate the effects of erzhu fuling san and its components on the tension of isolated caecum in chook, isolated intestine was adopted, the chook’s caecum was put in the magnus’ bath （maintained （41±0.5） ℃ constant temperature）, then the vary dosage decoction of rhizoma atractylodis, atractylodes macrocephala, tuckahoe and erzhu fuling san were added to observe the effect on the tension of isolated intestine. The result indicated that erzhu fuling san and its components (the decoction of atractylodes macrocephala, rhizoma atractylodis and tuckahoe) restrained the movement of intestine, reduced the contract and diastole tension and contract swing of chook’s isolated caecum.The effects of all kinds of the decoction enhanced with increase of the concentration.

Key words: chook; caecum; tension; erzhu fuling san