The work aims to study the migration of 26 chemical elements in PET films printed with four different inks under acidic conditions. Inductively coupled plasma-optical emission spectrometry (ICP-OES) was used to determine the initial content of 26 chemical elements in food plastic packages, including lead, cadmium, chromium, and so on. Inductively coupled plasma-mass spectrometry (ICP-MS) was used to determine the migration of these elements to food simulant (3% acetic acid). The amount of migration of 26 elements such as lead, cadmium and chromium increased with the increase of temperature and time, and reached the respective migration equilibrium. The spike recovery of ICP-OES method was 80.2%~109.7% and the RSD was 0.3%~12.9%. The spike recovery of ICP-MS method was 83.1%~118.6%, and the RSD was 0.7%~14.8%. The maximum migration to 3% acetic acid of 26 chemical elements are all below the standard limit values.