The research on the dispersion of liquid crystal wavefront correctors is introduced,using the lens of 250D focus,250D astigmatism and the narrow band filter of 650 nm,670 nm,710 nm,840~860 nm,835~865 nm,830~870 nm.For the 850 nm near-infrared light,when the waveband below 30 nm,the dispersion of liquid crystal wavefront correctors has little affect to the system,which can be working with high energy; when the waveband over 40 nm,the affect will not be overlooked.Dispersion of liquid crystal of visible light is almost the same as near-infrared.As conclusion,the waveband that the liquid crystal wavefront correctors may correct with high energy and small dispersion is assured to be 30nm to 40 nm at visible range.