Abstract: In order to further improve sterilization ratio for the liquid foods using pulsed electric field and prolong shelf life, the pulse-generating network of unipolar square wave was designed based on the waveform and energy efficient. Through calculating the liquid food equivalent circuit and obtaining the discharge capacitance value according to energy threshold, the pulse-generating network parameters were derived. The modeling and simulation of square wave pulsed circuits were conducted by using power system block toolbox and obtained the square wave with peak value of 35 kV, flat top pulse and rapidly decline. It shows that the simulation of pulse-generating network is a feasible approach and the results can provide theoretical basis for improving pulse-generating circuit.