Aiming at the problem about early blasting of the detonating network in industry, a type of irreversible detonation explosive diode was designed and develop by numerical simulation method. Using the combination of ignition and growth model and ANSYS/LS-DYNA finite element software are transmitting positive detonation was simulated by various mass of the firing charge and the stopping backward detonation was simulated by various length of the delay element. Then the feasibility was validated by the positive and negative symmetry experiment and the velocity measurement of flying plane. Results show that the explosive diode can achieve the aims of successful transmitting positive detonationsignal and stopping backward detonation signal and that the mass of firing charge and the length of linear delay elements must be limited. The least mass of firing charge is 30 mg and the minimum length of delay elements is 4 mm at 30 mg firing charge.