Ecological automatic fertilization device for barren soil in karst rock mountain area

The utility model discloses an ecological automatic fertilization device for barren soil in a karst rock mountain area. The ecological automatic fertilization device comprises a hollow pile, a timing system, a control system and a water pump are arranged in the hollow pile; a plurality of spraying pipes are arranged on the side part of the upper end of the hollow pile; the spraying pipe comprises a pipeline, a scattering device and a plurality of atomizing nozzles; one end of the pipeline is connected with the hollow pile, and the other end is provided with a spray hole; a spray head is arranged in the spray hole; a fixing plate is arranged in the upper end of the hollow pile and connected with the inner wall of the hollow pile. A motor corresponding to the spraying pipe is arranged on the fixing plate; a rotating head on the motor is connected with a rotating plate; an eccentric convex block is arranged on the rotating plate; the eccentric protruding block is connected with a rotating arm rod. A main water p