Flour was chosen as sample and the migration of printing ink components from KFC's paper packaging into flour was studied through single-sided contact. AAS results showed that trace amounts of heavy metal contaminants from printing inks in paper packaging migrated into the food flour. The concentrations of lead (Pb) and Cadmium (Cd) were detected. GC-MS results showed that plasticizer dibutyl phthalate (DBP) of the printing inks in KFC's paper packaging migrated into the flour. A rapid and precise method for characterizing the migration of printing ink components from paper food packaging materials into food was established.