N-DECYLTRICHLOROSILANE can be used to prepare a reactive vertically oriented organosilicon material. On the surface of a substrate without a PI film, the liquid crystal molecules can be vertically aligned by hydrogen bonding between its own Cl atoms and the -OH on the substrate surface. When heated, the -Si-Cl in the organosilicon material reacts chemically with the -OH on the substrate surface to form -Si-O- bonds, which are chemically anchored to the substrate surface, further improving the stability of the anchored liquid crystal molecules.