Plastic filament cooling tank

The utility model relates to a plastic wire cooling tank. The device comprises at least two cooling water tanks, sludge cavities, water inlet cavities, cooling cavities, a water inlet pipe, a coarse filter plate and a sludge outlet pipe, wherein the cooling water tanks are sequentially arranged in the direction far away from the filament extruding machine; the sludge cavities are formed in the bottoms of the cooling water tanks; the water inlet cavities and the cooling cavities are formed in the tops of the cooling water tanks; the fine filter plate is arranged on a partition wall of the water inlet cavity and the cooling cavity, the water outlet pipe is communicated with the cooling cavity, the first separator roller is rotationally connected to the cooling cavity, and the second separator roller is rotationally connected to the end, away from the filament extruding machine, of the cooling water tank. According to the utility model, particulate matters in raw water are removed through the coarse filter scree