The three-line table is usually used in sci-tech periodicals, but some scientific papers do not use it, or use no standard form, such as column subordinate relationship is not clear, quantities and units in the form is not standard，improperly adds auxiliary line, as well as two-line table is misused for three-line table. All of these influence the thesis information effective communication. In three-line table the column information should have the same characteristics or attribute, and its reading path is vertical reading. If the form information belongs to the horizontal reading, it should be designed as two-line table. The quantity and unit in form should be expressed as “quantity/unit”. If necessary, the auxiliary line could be added in three-line table.