Traditional Chinese medicine and botanical extraction processes produce massive wet herbal residues after leaching and filtration. The wet residue features high water content, sticky texture and large volume, bringing difficulties in transportation, stacking and harmless treatment. Traditional natural drying and filter press dewatering have low efficiency, high residual moisture and unstable treatment effect, restricting standardized factory production and environmental discharge. The horizontal decanter centrifuge realizes continuous, high-efficiency mechanical dewatering of herbal residues through centrifugal sedimentation. It significantly reduces the moisture content of waste residues, recovers residual extracting solution, reduces waste volume and lowers subsequent processing costs. It provides a green and continuous solid-liquid separation solution for modern herbal medicine deep-processing enterprises.