Wide nematic phase mixed liquid crystal material with low threshold value

The invention provides a wide nematic phase mixed liquid crystal material with a low threshold value. Four compounds are adopted; a component A has a bicyclohexane structure and the lowest viscosity, and contributes to improving the response speed of the mixed liquid crystal material in a display device; a component B is a compound having a framework that cyclohexane is directly connected with a benzene ring and containing a fluorine substituent, and is used for forming the nematic phase of liquid crystal and inhibiting a smectic phase of the mixed liquid crystal material; a component C has a polyfluorophenyl structure, is connected with the cyclohexane through an intermediate bridge bond, can provide certain dielectric anisotropy and has wide temperature width of the nematic phase; and a component D has a polyfluorobiphenyl structure and has the effect of greatly reducing the threshold voltage of the mixed liquid crystal material. The liquid crystal material prepared has a wide nematic phase of which the tem