The invention relates to the technical field of preparation process of liquid crystal displays, and discloses an orientation device which is used for improving the homogeneity of the fur lengths of orientation friction cloth in the orientation device and then improves the homogeneity of orientation process. The abovementioned orientation device comprises a base station, an orientation roller and an installation rack that is used for installing the orientation roller in pivoted manner, the base station is provided with a supporting surface that supports a base plate, the orientation friction cloth is attached on the orientation roller, the installation rack is provided with installation parts used for installing one end of the orientation roller respectively, the orientation device also comprises at least one laser emission unit which is arranged on the installation part where one of two ends of the orientation roller is positioned, and a set distance exists between the light rays given out by each laser emission unit and the axis of the orientation roller; laser blocking units that are corresponding to the laser emission units one to one are arranged on the installation part where the other end of the two ends of the orientation roller is positioned; a controller that is in signal connection with each laser emission unit is used for controlling some or all the laser emission units to open when the orientation roller conducts frictional orientation on the surface of the base plate.