The utility model provides a communicated pond bank ecological-filtration treatment device. The communicated pond bank ecological-filtration treatment device comprises a wooden frame body (1), a first zeolite layer (2), a first bamboo charcoal layer (3), a first soil layer (4), a third zeolite layer (5), a second soil layer (6), a second bamboo charcoal layer (7) and a second zeolite layer (8), wherein the first zeolite layer (2), the first bamboo charcoal layer (3), the first soil layer (4), the third zeolite layer (5), the second soil layer (6), the second bamboo charcoal layer (7) and the second zeolite layer (8) are sequentially arranged in the wooden frame body (1) from left to right. The communicated pond bank ecological-filtration treatment device is simple in structure and low in cost, can be assembled in a modular mode and can be formed through multiple-layer combination or multiple-row combination according to the actual height and width of a pond bank, can be stably arranged by means self weight, can facilitate filler replacement according to the demand or can be integrally arranged or can be reused after being subjected to back washing, can effectively incept, filter and treat runoff, pond water and other lightly-polluted slowly-flowing water bodies, meanwhile can fully utilize the existing pond bank and does not occupy land.