This paper presents the research on intestines＇ dynamic viscoelasticity （DV）. The relaxation process of an in- testine material was described using the five-element model （ FEM）, and the viscoelastic constitutive equation of the material was obtained. A physical simulation platform was constructed and a fixture was developed according to the negative pressure adsorption principle to perform the material＇ s shear-relaxation test. The FEM＇ s effectiveness was verified and the model＇ s parameters were obtained through the experiment. Then the model was applied to a vibratory capsule robot and the intestine＇ s DV at a certain frequency was obtained according to the motion parame- ters of the capsule robot. The paper comes to three conclusions. First, the FEM fits well into modeling the shear-re- laxation process. Second, the parameters of the intestine＇s viscoelastic constitutive equation are not constant, but changes with strain. Third, when the capsule robot makes a free vibration, the whole system is in an overdamping condition, which means that the capule robot moves damped with no reciprocation.