The output waveform of capacitive voltage divider has top tilt when measuring square-wave signal with pulse width of several microsecond. To solve this problem, an improved two-end matched capacitive divider is designed. The capacitive divider with two-end matching modes is simulated in frequency domain and time domain. The simulation results show that the linearity of the amplitude-frequency characteristic of the capacitive divider is not good in the middle frequency band. And the output waveform of the divider has overshoot when it responds to square wave signals. The calculation method of the beginning resistance and the corresponding terminal series capacitance has been improved, and the two-end matched capacitive divider has been improved. The experimental results show that when the low-voltage arm capacitance of divider is 2 nF and the electric length of the signal cable is 50 ns, the output waveform of the improved two-end matched capacitive divider has no top tilt , and the overshoot is less than 2%.