The utility model relates to a collapsible loess zanjon high structure of filling mainly rolls the soil layer including compaction in layers soil, plain native compaction stake, manual excavation groove, assembled humidification groove, top layer, compaction in layers soil border area sets up plain native compaction stake and excavation step, and compaction in layers soil upper portion is the tamplayer, and the soil layer is rolled for the top layer in tamp layer upper portion, the manual excavation inslot is provided with assembled humidification groove, assembled humidification groove mainly includes foraminiferous U shaped steel card slot, foraminiferous vertical drainage pipe and stake point, set up overlap joint tongue -and -groove and connection rib board around the foraminiferous Ushaped steel card slot, upper portion sets up the opened and shut apron that has the water injection hole, and the bottom sets up foraminiferous vertical drainage pipe and stake point. The utility model provides a can promote that the filler humidification is even, improve low moisture content collapsible loess intensity, reduce the soil layer compressibility, carry high homogeneity, reduce foundation uneven settlement.