Abstract: The Paper researched the transmission characteristics of capacitive voltage dividerwith long cables in Z_3=Z_0, Z_=∞. The Paper obtained the analytic resolution andits difference form for U_(in)(s) = G(s)~(-1)U_0(s)in the time domain too. These resolu-tions may be used to reconstruct the input waveforms. The quantitative relations between waveform distortion and the measurement system are given.