The invention relates to a production device for a copper-based nutrition protecting agent. The production device comprises a slurry type mixed reaction kettle, a control box, an automatic feeding hopper, a weight sensor, a mixer, a vertical sand mill, a centrifugal machine, a pressure filter, a spraying and drying tower, a drying device, a fluid jet mill, a pressure spraying and stirring conveyor and the like. The production flow of the production device comprises the production processes such as preparation of cupric hydroxide colloid, addition of nutrient components and assistants, dispersing, sand milling, centrifuging, press filtering and drying; and the production device can be used for producing granular products, powdery products or ointment products. The products have the advantages of high content of effective components, favorable suspension property, double functions of sterilizing and providing nutrition, strong adhesive force on the surface of a plant after being sprayedand applied, high uniformity, rain water washing resistance, durable effect, labor force and physical resource saving and convenience in storage, transportation and use.