The different phenomenon of interline transfer (IT) CCD crosstalk effect induced by intense light is observed with different CCD and laser parameters. Experimental results show that CCD crosstalk is related with incident light wavelength, the crosstalk line gray-scale value distribution in any column is in proportion to light intensity in corresponding column, the sum of the crosstalk line gray-scale value N in any line is in proportion to light intensity directly. The crosstalk line gray-scale value is in proportion to IT time in any line, and the sum of the crosstalk line gray-scale value N has no relation to the light spot in focal-plane and CCD integrated time. And the mathematic expression describing CCD crosstalk features is given.