Earth and rockfill dam slope protection structure

The utility model belongs to the technical field of earth and rockfill dam construction, and particularly relates to an earth and rockfill dam slope protection structure. The dam comprises a dam body with a trapezoidal cross section, a special-shaped concrete protection slope with a trapezoidal cross section and a transition filter material, and the transition inverted filter material is arranged between the dam body and the special-shaped concrete protection slope. The lower bottom length b is calculated according to the upper bottom length a, the height c and the downstream side slope ratio n of the special-shaped concrete protection slope and the slope ratio m of a preset dam slope, the special-shaped concrete protection slope is cast in situ at the preset position according to the calculation result, a dam body is filled, and transition filter materials are filled between the special-shaped concrete protection slope and the dam body. After the built dam body and the transition inverted filter material are