The invention discloses a horizontal vacuum belt type filter which comprises a rack, a driving roller, a driven roller, a belt
support system, an annular belt, a piece of filtering cloth, a vacuum boxmechanism and a feeder, wherein the belt
support system comprises a support track and a support track sliding strip; the vacuum box mechanism comprises vacuum boxes, liquid collection
branch tubes, airbags, push discs, mounting platforms and vacuum box chutes; the vacuum boxes consist of multiple sections of vacuum box bodies, vacuum box flanges, front vacuum box guides, rear vacuum box guides and vacuum box elbows; the feeder comprises a box-shaped overflowing mechanism, an upper cover and a
feeding tube; and the box-shaped overflowing mechanism comprises a box-shaped overflowing cavity, a
storage tank, a front
buffer tank, a rear
buffer tank, a front adjusting plate, a rear adjusting plate, a front inner support, a rear inner support, a
front cover plate, a rear cover plate, a left sidesupport and a right side support. By adopting the horizontal vacuum belt type filter, an excellent filtering effect can be ensured, the overall deformation resistance of a vacuum box is improved in the operation process, the feeding amount can be increased, product consumption in the filtering process is reduced, and uniform feeding can be ensured.