In reaction to the phenomenon of the pressure pulse within the Continuous Inkjet ink circulatory system, used the bellows as energy storage and diaphragm pump as a primary components, build the hydraulic simulation model of ink circulatory system via analyzing the critical components: diaphragm pump (including membrane, the suction valve and the outlet valve) and bellows. By analyzing the impact of pressure pulse restraint under the different bellows stiffness and the inner diameter of the restrictor, the optimal parameters of the bellows components were determined. The simulation results were verified by experiment on the test bench. The key point of the pressure pulse restraint is the proper matching of the bellows stiffness and the working pressure of the diaphragm pump.