Horizontal-type double-drum backwashing filter

The invention discloses a horizontal-type double-drum backwashing filter. The horizontal-type double-drum backwashing filter comprises a left side cover plate, a right side cover plate, a coarse filtering drum filter screen, a large particle collecting tank, a fine filtering drum filter screen, a sludge and sand collecting tank, a negative pressure water outlet, a high pressure water inlet, a high pressure jet pipe, a toothed belt, and a driving wheel; the horizontal-type double-drum backwashing filter is placed in water; sewage is delivered through the coarse filtering drum filter screen and the fine filtering drum filter screen successively for filtering; the high pressure jet pipe is arranged to be vertical to water surface, and is used for backwashing of the parts of the coarse filtering drum filter screen and the fine filtering drum filter screen above the water surface; large particle impurities are collected by the large particle collecting tank on the coarse filtering drum filter screen, and small par