Abstract: Literature study shows that there are some problems in the arrangement of the orthogonal test factor level table in the literature,such as the inaccurate table title,the irregular arrangement format of the item column information,the wrong column in the first column from the left,inconformity of the relationship between the column and the table data with the requirement of uniformity,the factor symbol regarded as the quantity symbol and arranged in italics,etc.In view of the above problems,some suggestions are put forward:take "factor level" as the table title;in parenthesized form,the congruence of factors and their symbols is indicated,that is,arranged in the form of "temperature (A)";change the first column from the left to "serial number";change the column "factor" to "level";factor code is typed.The method accords with the editing and proofreading standard,greatly simplifies the form design,and provides reference for the standard layout of the table in books and periodicals.

Key words: orthogonal test, factor, level, factor code, table title, item column, column