Abstract: An explosive diode was designed according to the principle of explosive logic components. This paper studied thorough experiment of the internal structure of the components to identify the length of extinction channel and flame-proof structure as key parameters. The flame-proof structure adopted the layered charges of different density including an excitation device, 1st charge of PETN, 2nd charge of PETN. Connecting the A-end and B-end to the detonating cord, changing the size of the extinction channel, ensuring the parameter of the layered charge to conduct the experiment of detonation reliability and explosion-proof safety, the results show that the detonation signal can detonate the B-end detonating cord, satisfying the reliability function while passing through the extinction channel of 10 mm to 35 mm by inputting from the A-end. While the detonation signal input from the B-end was not able to detonate the A-end detonating cord to meet the flame-proof function across the flame-proof structure and extinction channel when the length of the extinction channel is 15 to 35 mm. The result indicates the length of the extinction channel amongst 15 mm to 35 mm and the layered charge of different densities can be selected as the design standard of the blasting network to make the denotation signals transmit in one direction in the network, thus increasing the security of the network.