The invention relates to a lightning waveform parameter time domain statistical method based on an optical integrated electric field sensor, and belongs to the technical field of waveform analysis. According to the method, the three-phase independent lightning overvoltage waveform is separated from the original waveform through the method of filtering, overvoltage extraction and decoupling based on the measurement data of the optical integrated electric field sensor, and statistical analysis of the measured waveform parameters is performed in the time domain according to the definition of thewavefront time, the half peak time and the overvoltage multiple of the lightning impulse voltage standard waveform in the IEC. The method is based on the optical integrated electric field sensor and has the characteristics of being convenient to install and convenient to measure.