Ready−to−eat cooked dishes, including stir−fried dishes, steamed dishes, roast meat, deep fried dishes, shrimps and seashells, and dishes of local flavor, etc were irradiated with ,60,Co γ-rays, and.the decontamination effects were studied. The results showed that most of the cooked dishes are suitable for irradiation. The effective dose is 4kGy to 8kGy. Index of microbe of the irradiated dishes was conformed to the National Food−Health standards, and no significant sensory changes was observed with the irradiated dishes .The quality guarantee period (0—5℃) is 60 days.