In this Study, according to theprinciple of similitude, the model of bile duct system (that is BSM)has been simulated by transparent rubber and has been verified. Aspecific oscillator DZ-5 for the biliary system produced the pressure elastic waveswith differentwave shapes, frequency and amplitudes. A microcomputersystem are used to study the principle of the pressure elastic waves propagating in BSM and the function of Oddis sphincter, and then the experiment of removing gallstones on the experimental installation of BSM is carried out. Amechanism for movinggallstonesthat based on the theoreticalanalysis is verified by this study, and then to be perfected. It is suggested to put the one-way valve in T-type tube for patients whose sphincters loseeffectiveness. The optimum parameters of pressure elastic waves and the effect of pulse frequency on the removing gallstones have to be furtherdiscussed.