The invention belongs to the technical field of slope protection, and discloses a waterproof protection slope. The waterproof protection slope comprises an
expansive soil slope, a slope top protection table, a slope
toe protection table, a
polymer waterproof layer, an ecological
protection layer and a water guide channel. A solidification layer is formed on the
surface layer of the
expansive soil slope through a soil solidification agent; the slope top protection table is arranged on the slope top of the
expansive soil slope; a slope top intercepting
ditch is formed in the slope top protection table; the slope
toe protection table is arranged on the slope
toe of the expansive soil slope; a slope toe
drainage ditch is formed in the slope toe protection table; the
polymer waterproof layer is formed by combining one or more of waterproof coatings or cast-in-place coiled material waterproof
layers; the
polymer waterproof layer is laid on the surface of the solidification layer; the ecological
protection layer is laid on the surface of the polymer waterproof layer; the water guide channel is formed in the ecological
protection layer; and water in the slope top intercepting
ditch can be guided to the slope toe
drainage ditch. According to the waterproof protection slope, the polymer waterproof layer can reliably protect the expansive soil slope, and stress generated by expansive soil slope deformation can be buffered and released.