A food purifier includes a supporting base having an air outlet, an ozone generator supported in the supporting base for generating a flow of ozone mixing of air to form an airflow towards the air outlet, and a food container, which is supported on the supporting base, having an air inlet and a receiving cavity for containing the water and foods therein. A releasable valve is sealedly mounted at the air outlet of the supporting base for allowing the airflow to pass into the receiving cavity of the food container through the air inlet and for blocking the water from entering into the supporting base. An air dispenser is disposed at a bottom side of the receiving cavity of the food container for diffusing the airflow from the releasable valve to the water so as to guide the airflow in contact with the food.