The present invention discloses a method of improving quality of room temperature cooked food prefabricated packed meal after reheating and belongs to the technical field of prepared food processing. Radiofrequency sterilization, cold shock treatment and radiofrequency reheating are combined to reduce high temperature and high pressure sterilization strength of the prefabricated packed meal, and the method replaces conventional reheating and improves the quality of the prefabricated packed meal after the reheating. The method mainly comprises the following steps: raw material selecting, frying, oil-frying, cooking and stir-frying until half-cooked, cooked rice matching, vacuum sealing, radio-frequency sterilizing, cold shock treating, low temperature storing at 0-5 DEG C, radiofrequency reheating, reheating, and quality sense assessing. The main advantages are as follows: the radiofrequency sterilization is combined with the cold shock treatment and radiofrequency reheating, and the method meets the sterilization conditions, reduces the high temperature and high pressure sterilization strength, uses radiofrequency reheating to replace the conventional reheating, and reduces the destroy to the packed meal, especially nutrients and texture structures of the food. After the food is preheated, the sense assessment is conducted and the sense quality score of the product is not very different from that of the food just taken out from a pot.