The invention discloses a preservation treatment device for conger eel fillets and relates to preservation treatment devices for food raw materials.The preservation treatment device is provided with a stirrer lifting system, a pressure ultrasonic work chamber component cover rotation drive component, a cover rotating spindle part, a stirrer component, a motor direct-connection reducer, a pressure ultrasonic work chamber component, a discharge component, a bearing part, a machine base and a hydraulic system.The preservation treatment device has the advantages that efficient preservation treatment is performed on the conger eel fillets by using a pressure-ultrasonic-assisting method, preservation treatment efficiency is increased, and cost is lowered; the bearing part is coordinated with a discharge oil cylinder component, so that the preservation treatment device is stable in work and convenient in loading and discharge; a stirrer rotates at low speed to allow the preservation treatment effect to be even and consistent; a temperature-control-medium jacket type preservation treatment container is provided to prevent the preservation treatment process from being affected by environment temperatures; the preservation treatment device is also applicable to the preservation treatment of aquatic products such as squids and shrimps and raw materials such as meat.