Abstract: In order to deeply study and understand the space-time two-dimensional characteristics of sea clutter, a sea clutter measurement method based on shore-based multi-channel radar used for airborne platform motion emulation, as well as a characteristic analysis method of the measurement data in the corresponding scenario. With the technique of the inverse displaced phase center antenna, the shore-based multichannel radar shift the transceiver phase center with the pulse repetition period, which leads to the sea clutter data with space-time two-dimensional coupling characteristic. Meanwhile, the coherent pulses in the measurement data vary periodically with the number of radar channels, this feature can be used for the accurate estimation of the space-time characteristics of sea clutter of a single range cell. The results of the measured data show that, the sea clutter suppression obtained by the treatment proposed in this paper is better than the conventional method. The loss of signal-clutter-noise-ratio (SCNR) in the side-lobe region is better than 2 dB, and the average range-Doppler spectrum of the remaining clutter after space-time suppression is improved by 1 dB. The shore-based multichannel radar to carry out sea clutter measurement experiments under simulated airborne platform motion scenarios, which has the advantages of simple measurement, low cost and large amount of sample data acquisition. At the same time, the research of sea clutter space-time characteristics has greatly improved the accuracy of the characteristic analysis, which using a multichannel radar sea clutter characteristic analysis method.