The invention discloses a separated type rural sewage treatment device. A reaction chamber of the device comprises damping plates, a damping mesh, a flocculating agent injection port, reaction chambersupport frames, overflow channel ports and front-back movement type wave plates, wherein the reaction chamber support frames are of a cylindrical hollow structure, and the outer reaction chamber wallis formed between the adjacent vertical reaction chamber support frames; the four overflow channel ports are formed in the upper ends of the vertical reaction chamber support frames and communicatedwith a precipitate discharge pipe; the three front-back movement type wave plates are located at the upper end in the reaction chamber, the adjacent front-back movement type wave plates are distributed at an equal interval, and each front-back movement type wave plate is M-shaped; the front-back movement type wave plates are connected with an external motor through support rods; the damping platesare distributed at the lower ends of the front-back movement type wave plates. The separated type rural sewage treatment device is low in cost, high in efficiency, high in practicability and wide inapplicable range.