The invention discloses a water guiding box for an environment-friendly sewage treatment tank. The water guiding box comprises a water guiding box body, a first filter screen, a filter frame and a separation plate, wherein the water guiding box body is in a circular truncated cone shape with a large upper end diameter and a small lower end diameter, the first filter screen is fixed on the top of the water guiding box body by virtue of an installation pin, the filter frame is fixed inside the water guiding box body, the filter frame consists of an annular fixed plate, a fourth filter screen anda top plate, a water through pipe is fixed on the center of the separation plate in a penetrating manner, the upper end of the water through pipe is provided with a filter cover, a rotating shaft isinserted inside the through water pipe, the rotating shaft is provided with impellers which are distributed in an array manner in the through water pipe, the top of the rotating shaft is fixedly provided with a rotating column, the periphery of the rotating column is provided with three clearing rods which are circularly distributed in an array manner. According to the water guiding box for the environment-friendly sewage treatment tank, by virtue of four-time filtering of the first filter screen, the second filter screen, the fourth filter screen and the third filter screen, the domestic sewage filter effect is good, the filter quality is high, the water guiding box is uneasy to block, and the subsequent sewage treatment is facilitated.