Objective: To guide the clinical rational use of Magnoliae Officinalis Cortex by studying its usual oral dosage in decoction. Method: This paper collected ancient literature of traditional Chinese medicine (TCM) containing Magnoliae Officinalis Cortex

Excel 2013 was used to screen Magnoliae Officinalis Cortex formulae with water decoction and oral administration

database of Magnoliae Officinalis Cortex formulae was constructed by SQL Server 2008.SPSS 19.0 was adopted to calculate mode

frequency

mean and other parameters. Result: This study collected 4 674 formulae containing Magnoliae Officinalis Cortex from ancient literature of TCM

and 775 Magnoliae Officinalis Cortex formulae with water decoction

oral administration and containing dose were screened out.During these Magnoliae Officinalis Cortex formulae

dosage of Magnoliae Officinalis Cortex<3 g accounting for 23.87% of the total

3-11.2 g accounting for 52.26% of the total;11.3-30 g accounting for 12.26% of the total;>30 g accounting for 11.61% of the total. Conclusion: The commonly used dosage of Magnoliae Officinalis Cortex should be 3.5-11 g.In ancient literature

main processing method of Magnoliae Officinalis Cortex in decoction is ginger mix frying.The common dosage of Magnoliae Officinalis Cortex in formulae is relatively large before Song dynasty

and relatively less after Song dynasty.