Micro-type field weeding machine

The present invention discloses a micro-type field weeding machine. The micro-type field weeding machine comprises a rack, a pushing and holding handle is connected above a rear part of the rack, support wheels are disposed at two sides below the rear part of the rack, a drive device is installed on the rack, a power output shaft of the drive device is connected with an overrun clutch, a front part of the overrun clutch is provided with a front dust prevention and mud guarding mechanism, an output shaft of the overrun clutch penetrates through the front dust prevention and mud guarding mechanism and then is in transmission connected with a speed changing box disposed in a front part of the rack, an upper dust prevention and mud guarding mechanism is disposed at an upper part of the speed changing box, and the front part of the speed changing box is connected with a weeding knife roll disposed in the front of the rack. With adoption of the micro-type field weeding machine, weeding speed is effectively raised; the weeding machine is adequate in power output, smart and flexible, energy-saving and environment-friendly, low in seedling injuring rate and high in weeding clean ratio; sticking of clay onto the machine is effectively avoided, and safety of workers is ensured.