Horizontal stock of multistage bank protection is consolidated and bottom bank protection drainage mixed structure, this mixed structure divide into horizontal stock reinforcerment system of bank protection and bottom bank protection drainage system, the horizontal stock reinforcerment system of bank protection sets up on the well upper portion of multistage bank protection, and bottom bank protection drainage system sets up the bottom at multistage bank protection. Bank protection between road surface and the road bed bottom surface sets up in grades, and the bank protection section on upper portion adopts cement anchoring block, horizontal stock to reinforce in each, cement anchoring block's laying angle equals with the bank protection slopes at different levels on road surface, in the top of the cement anchoring block bottom embedding subordinate bank protection of every grade of bank protection, be equipped with horizontal stock between cement anchoring block and bank protections at different levels domatic, laminate arrangement is parallel to each other between each horizontal stock. The utility model discloses a bottom bank protection drainage system arranges with the horizontal stock reinforcerment system of bank protection is compound, can effectively reduce surface drainage to the influence of subgrade stability performance, and the construction of this structure is simple, and practicality is very good.