It is pointed out that the land clutter

when the radar grazing ange is low

will cause the time spread 0f radarecho signal

For the pseudo-random code continuous wave （PRG-CW） radar

the echo signal at a specified moment will be thesuperpostion of some spread echo signals in a period of time before this specified moment. A superposition algorithm was proposed to calculated the PRC-CW radar signal. Based on the former results on the characterstics of land clutter

and consideringtemporal and spatial correlation charateristics between defferent resolution cells

the temporal correlation characteristics of theecho signal of land clutter for the PRG-CW radar are investigaed with simulation method. The results indicate that the echosignal of land clutter for PRG-CW radar is more corrlated than that for pulse radar.