In our country, there had been accomplished many single types of animal experimentation or human dietary observation of irradiated food. All these tests we proved to be safe.,If the irradiated food are commercialized, we will eat a variety of irradiated food, will they be safe too? For this purpose, we have done the animal experimentation with multiple kinds of irradited food. The food was irradiated with the dosage double the dose normally required for food preservation of 0.1-8.0 kGy. The irradiated food in the feed we prepared occupied 80% of dry weight. The feeding study lasted for 150 days. The indices including nutritional composition of food and its utilization, rate of growth and development blood examination, mutagenic test and pathological examination showed no significant difference between the experimental group and its references.,This result gave us enough evidence for the further human dietary observation of multiple irradiated food or commercialization of irradiated food.