Earthworm manure fertilizer coating equipment is used to add a layer of protective coating on the surface of the fertilizer granules to improve their quality and prevent caking during storage and transportation. The coating material can be a nutrient-rich substance or a polymer-based compound. The equipment typically includes a coating drum, a feeding device, and a spraying system. The drum rotates at a constant speed to ensure even coating of the fertilizer particles. The feeding device delivers the fertilizer granules to the coating drum, while the spraying system sprays the coating material onto the granules. The equipment may also include a cooling system to prevent the coating material from melting or sticking to the granules.