The invention discloses a flexible targeting spraying mechanism for orchards. The flexible targeting spraying mechanism comprises a spray support, a main spray pipe, a plurality of side spray pipes and a control device. The main spray pipe is disposed on the spray support which comprises a telescopic arm, a diagonal bracing arm and a horizontal arm, and the telescopic arm, the diagonal bracing arm and the horizontal arm are connected in sequence; the main spray pipe correspondingly comprises a vertical section, a diagonal section and a horizontal section; the side spray pipes are arranged on the horizontal section, and each side spray pipe is provided with a nozzle; a first solenoid valve is arranged on the main spray pipe, a first electric putter is arranged at the joint of the horizontal arm and the diagonal bracing arm on the spray support, a second electric putter is arranged at the joint of the diagonal bracing arm and the telescopic arm on the spray support, and the first solenoid valve, the first electric putter and the second electric putter are all respectively and electrically connected with the control device. By the flexible targeting spraying mechanism, shape of the spray support can be manually or automatically adjusted according to line spacing and row spacing of planted fruit trees and sizes thereof, so that targeting spraying effect can be guaranteed, pesticide utilization and spraying efficiency can be improved, waste of pesticides can be reduced, and further environmental pollution can be avoided.