The invention provides a coastal reservoir land reclamation type bank protection structure. The coastal reservoir land reclamation type bank protection structure comprises earth-filled interface steps, water-permeable earth-filled layers and water-impermeable earth-filled layers, wherein the earth-filled interface steps are arranged along a bank protection foundation slope surface; each water-permeable earth-filled layer is arranged on the corresponding earth-filled interface step in a covering manner; and each water-impermeable earth-filled layer is arranged on the corresponding water-permeable earth-filled layer in a covering manner. The water-impermeable earth-filled layers are arranged into a multi-level step structure along the bank protection foundation slope surface from bottom to top. A water-permeable earth-filled layer is also arranged at the whole bottom of the water-impermeable earth-filled layer step at each level. Anti-seepage geotechnical cloth is arranged between each water-permeable earth-filled layer and the corresponding water-impermeable earth-filled layer. The water-permeable earth-filled layers are formed by being filled with sand gravel. The water-impermeableearth-filled layers are formed by being filled with a viscous soil body in a layered manner. By means of the coastal reservoir land reclamation type bank protection structure, the land-filled structure which guarantees stability of a coastal reservoir bank slope and meanwhile newly increases land is formed; the geological environment of a coastal reservoir region is effectively protected; and exploitation and utilization of bank slope land resources are promoted.