Zdu series continuous belt vacuum filter is a device for solid-liquid separation driven by vacuum negative pressure. Structurally, the filter section is arranged along the horizontal length direction, which can continuously complete filtration, washing, drying and filter cloth regeneration. The device has high filtration efficiency, large production capacity, good washing effect, low moisture content of filter cake and flexible operation, Low maintenance cost. It can be widely used in solid-liquid separation in metallurgy, mining, chemical industry, papermaking, food, pharmacy, environmental protection and other fields, especially in gypsum dehydration in flue gas desulfurization (FGD).