Toilet floor drain anti-leakage structure of multi-story building

According to the toilet floor drain anti-leakage structure of the multi-story building, a waterproof layer, a drainage main pipeline, a filling layer and a floor layer are sequentially arranged on a cast-in-place concrete layer, and a flow guide assembly and a supporting assembly for fixedly supporting the flow guide assembly are embedded in the filling layer; the supporting assembly comprises fixing rings, connecting rods, arc-shaped blocks and L-shaped supporting rods, the flow guide assembly comprises a plurality of S-shaped pipes arranged along the drainage main pipeline and straight pipes fixed to the water outlet ends of the S-shaped pipes, the S-shaped pipes are sleeved with the fixing rings, the fixing rings are arranged at the first turning positions of the S-shaped pipes, and the adjacent fixing rings are connected through the connecting rods. An arc-shaped block matched with the inwards-concave space in size is arranged on the inwards-concave side of the second turning position of the S-shaped pipe