For compactness of pulsed power system by using glass-ceramic, bulk breakdown field strength EB of 2 mm glass-ceramic slices is discussed and transmission characteristics of glass-ceramic bi-plate transmission line with the ratio of electrode width and distance between electrodes in the range of 0.6 to 2 are measured. Considering the influence of circuit distribution parameters, characteristic impedance is calculated by measuring pulse width, amplitude and reflected wave amplitude in the case of unmatched load, and a revised formula is presented. Experimental results show that EB of niobate sample and B2O3 are 20.2 kV/mm and above 29.6 kV/mm by measuring EB of 2 mm glass-ceramic sample under pulse voltage with 250 ns pulse width, respectively.