Sewage treatment device with multi-stage filtering function

The utility model discloses a sewage treatment device with a multi-stage filtering function, and relates to the technical field of sewage treatment, in particular to the sewage treatment device with the multi-stage filtering function, which comprises a treatment box, the inner wall of the treatment box is rotatably connected with a round rod through a bearing, and the end part of the round rod is provided with a first connecting rod. According to the sewage treatment device with the multi-stage filtering function, through the arrangement of a round rod, a first connecting rod, a second connecting rod, a moving rod, a convex sliding block, an impact block, a supporting rod, a strip-shaped block and a transmission wheel, the sewage treatment device with the multi-stage filtering function has the effects of reducing the probability of blockage of a filter screen and improving the filtering efficiency; through rotation of a round rod, a first connecting rod and a second connecting rod can conveniently drive a mov