Agricultural weeder for environment-friendly treatment of weeds on ridging planting zone and application method thereof

The invention discloses an agricultural weeder for environment-friendly treatment of weeds on a ridging planting zone and an application method thereof. The weeder comprises a rack and a weeding assembly. The weeding assembly comprises a motor, a rotary shaft and a mounting rack. The motor is arranged on the top surface of a mounting plate, and the output shaft of the motor penetrates the mountingplate downward and is in driving connection to a longitudinally arranged rotary shaft. The mounting rack comprises a transverse plate and a mowing mechanism and a driving mechanism arranged on the transverse plate, the transverse plate is in a triangular plate shape, mounting grooves symmetrically sink in two side faces of the transverse plate, two mowing mechanisms are symmetrically arranged ontwo sides of the transverse plate, a driving mechanism connected to the mowing mechanisms is arranged on the transverse plate, each mowing mechanism comprises a center shaft, a driven belt disc and amowing knife, the driving m