The utility model discloses an ecotype joint bank protecting structure. The ecotype joint bank protecting structure comprises a plurality of prefabricated concrete blocks which are arranged side by side, wherein each prefabricated concrete block is a plate-shaped concrete block, the end surface of each prefabricated concrete block is a regular hexagon, each prefabricated concrete block is hollow, and plants are grown in the hollow structure of each plate-shaped concrete block. According to the ecotype joint bank protecting structure, the soil organism engineering method is applied, the appropriate bank protection plants are grown on the hollow portion of each hexagonal concrete block so that the original functions of a bank slope can be kept, the environment can be protected, and the ecological conditions can be improved. Therefore, the ecotype joint bank protecting structure is formed and suitable for bank slope protection and greening. The ecotype joint bank protecting structure can prevent water flow from corroding the bank slope, greatly improves the stability of the bank slope, reduces soil and water loss, and decelerates water flow close to a river bank. The bank protection plants can effectively prevent solar radiation, thereby playing a certain role in cooling water. Due to the covering effect of the plants, the good habitat provided for river living things can be provided. In addition, the plants can have the water purification function.