CB meal cooler adopts the counter-current air cooling principle, allowing high-temperature materials and ambient air to fully heat exchanging in counter flow within closed casing. The low-speed paddle structure drives the material to turn gently, effectively avoiding excessive breakage and oxidation of the powder, enabling the fishmeal to cool rapidly to a suitable temperature for packaging and storage, reducing the risk of condensation and re-dampening, and maintaining stable product quality. The closed design simultaneously reduces dust leakage, ensures a safe production environment, and comprehensively improves the stability and batch consistency of the finished product quality.