The invention discloses a three-disc type orchard obstacle-avoiding mowing device, which mainly includes a frame, a lifting mechanism, a leveling mechanism, an obstacle-avoiding device, and a cutting device. The frame and the lifting arm are connected through the rotary shaft and the rotary cylinder, the frame and the rotary cylinder are hinged, the hydraulic cylinder I is connected between the two parts, the rotary cylinder is hinged with the lifting arm, the hydraulic cylinder II is connected between the two parts, and the front end of the lifting arm is connected There is a support, the lifting arm is hinged with the support, the hydraulic cylinder III is connected between the two parts, the hydraulic motor is fixed on the upper part of the support, the transmission shaft is connected with the output shaft of the hydraulic motor through a coupling, the cutting disc is connected with the transmission shaft, and the three cutting shafts are The pulley is connected to the transmission shaft, and a cutting knife is installed at the bottom of each cutting shaft, and the distance between the three cutting knives is 120°, and the instantaneous operation track is distributed in three discs. The invention has reasonable design, high working efficiency, can adjust the stubble cutting height, removes weeds between rows of fruit trees, can effectively avoid missed cutting, and has good application prospects.