Annular cutting machine

The utility model relates to the technical field of crop harvesting, in particular to an annular cutting machine which comprises a fixing ring, a cutting assembly used for picking crops is arranged in the fixing ring, the cutting assembly comprises nine through holes which are sequentially formed in the fixing ring in a circular mode, a fluted disc is arranged in the fixing ring, and the fluted disc is connected with the cutting assembly. Nine sliding grooves and limiting grooves are sequentially and circularly formed in the fluted disc, nine blades are arranged on the outer wall of the fluted disc, rotating holes and limiting rods are arranged outside the nine blades, a mounting frame is arranged at the top of the fixing ring, a motor is arranged outside the mounting frame, a screw rod is arranged at the output end of the motor, and a screw rod is arranged at the output end of the screw rod. And a gear is arranged outside the screw rod. Through gear transmission and a linkage structure, the defect that an ex