A new kind of threecylinder type continuous hydraulic turbocharger was analyzed. The structural parameters which might influence the turbochargers boosting pressure speciality were gotten. The simulation model of its system was built. The simulation results were explained of the hydraulic turbochargers second pressure existed of the shock wave. Aimed to drop the second pressure shock wave of the turbocharger, by simulated analysis of the models with different groups of structural parameters, the quite reasonable turbochargers structural parameters are gotten.