Abstract: The transit time and gain characteristics of electrons which travel in the micro-channel plate gated by picoseconds high voltage pulse were simulated. The curves of the transit time versus the voltage pulse width and the voltage amplitude are obtained when the waveforms of the voltage pulse are Gauss, triangle and trapezoid. The variations of the FWHM and peak of the gain curves with width and amplitude of the voltage pulse are obtained when the incident electrons have a gauss distribution. The results indicate that the transit time and gain characteristics of electrons are better when the voltage applied to the MCP is trapezoidal wave, compared to those of triangular wave or Gaussian wave.