Pulse sharpening effect of nonlinear transmission line (NLTL) with nonlinear capacitors has been applied to fast high voltage pulse generation. NLTL can be utilized for high repetitive operation, since NLTL consists of only passive elements. The: main problem of the scheme is difficulty of obtaining nonlinear capacitors with high withstand voltage. In this study, we employed commercially available BaTiO, ceramic capacitors as nonlinear capacitors, and confirmed the high voltage operation of NLTL in the voltage range of up to 20kV.