To simplify the production process of ruthenium oxide(RuO₂) ignition bridge, improve the output energy and meet the requirements of low energy ignition and rapid response, the 30 kinds of V-type RuO₂ ignition bridges with different structure size were designed and manufactured by a low-temperature co-fired ceramic(LTCC) technology. The electro-explosion properties of the bridge under constant-voltage excitation were investigated. The ignition ability of B/KNO₃ mixture was evaluated according to the ignition test results of B/KNO₃ mixture. The results show that the design of V-type structure is conducive to improving the current density in the bridge area and forming hot points in the narrowest part of the V-type bridge, which is conducive to reducing the energy required by electro-explosion.The angle, length/width ratio and width of the V-type RuO₂ ignition bridge have great influence on electro-explosion performance. Under 40 V constant-voltage excitation, when the angle, length/width ratio and width of the narrowest place of V-type RuO₂ ignition bridge are 60°, 0.43 and 100 μm, respectively, the input energy required by electro-explosion is small, its value is 1.47 mJ, the output energy is maximum, its value is 8.46 mJ, which can ignite B/KNO₃ mixture.