Vacuum cell aligning device and cell aligning method

Disclosed are a vacuum cell aligning device and a cell aligning method. The vacuum cell aligning device comprises an upper machine table (40) and a lower machine table (50), and further comprises a plurality of first cell pressing units (41), a plurality of second cell pressing units (51) and an adjusting mechanism, wherein the plurality of first cell pressing units are arranged on the upper machine table (40) in parallel, and comprise first end faces (411) facing to the lower machine table (50), and each of the first cell pressing units (41) is arranged corresponding to a sub-area of an upper substrate to be aligned; the second cell pressing units are arranged on the lower machine table (50) in parallel, and comprise second end faces (511) facing to the upper machine table, and each of the second cell pressing units (51) is arranged corresponding to a sub-area of a lower substrate to be aligned; and the adjusting mechanism is used to adjust the first cell pressing units (41) and to combine the individual first end faces so as to form a shape corresponding to the upper substrate, and is used to adjust the second cell pressing units (51) and to combine the individual second end faces (511) so as to form a shape corresponding to the lower substrate. The vacuum cell aligning device can be used to align substrates in various curvatures, the shape of an end face of a cell pressing unit matches with the shape of a substrate to be pressed, and the cell pressing unit being attached to a substrate to be aligned can ensure cell aligning quality and cell aligning accuracy.