Waste water treatment filter device, comprising a housing (1) equipped with a water inlet (2) and a water outlet (3), with water inlet on one side of the housing and water outlet on the other side of the housing, where a primary treatment line (4) and a secondary treatment line (5) are provided within the housing, the primary treatment line being placed before the secondary treatment line,where a water inlet of the primary treatment line is connected to the water inlet and its water outlet is connected to a water inlet of the secondary treatment line, where a water outlet of the secondary treatment line is connected to the water outlet,where the primary treatment line and the secondary treatment line are S-shaped lines arranged laterally, the S-shaped lines being a first descent section (6),include an ascent section (7) and a second descent section (8), one end of the ascent section being associated with the first ascent section and the other end of the ascent section with the second descending section, the first descending section, the ascent section and the second descent section are connected one by one,where the first descent section along the direction of water flow sequentially with a first filter layer (9),is equipped with a second filter layer (10) and a third filter layer (11), the ascent section along the water flow direction being sequentially equipped with a fourth filter layer (12),is equipped with a fifth filter layer (13) and a sixth filter layer (14), the second descent section along the water flow direction being sequentially equipped with a seventh filter layer (15),is equipped with an eighth filter layer (16) and a ninth filter layer (17).
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