Composite inverted filtering structure

The utility model discloses a composite inverted filtering structure, which comprises a geotextile and an auxiliary part for keeping the vertical and lateral dimension of the geotextile unchanged and unfolded, wherein the auxiliary part is attached to the geotextile; micropores are distributed in the geotextile; a relationship between the equivalent aperture of the geotextile and the characteristic particle size of protected soil is consistent with an inverted filtering criterion. According to the composite inverted filtering structure, the quality problems of folding, poor overlapping, improper immersion depth and the like of the geotextile after jetting sinking are effectively solved, and good inverted filtering effects are achieved.