The invention discloses a grooving machine in the field of grooving. The grooving machine comprises a rack, a material frame, a control box, an instrument trolley, a pressing air cylinder, a groovingair cylinder, a fixing base, a nicking tool, a pressing die, a feeding plate, a discharging air cylinder, a discharging rod and a feeding air cylinder. An unloading port is formed at the top end of the rack close to the center, a material frame supporting piece, a pressing air cylinder supporting piece, a discharging air cylinder supporting piece and a grooving air cylinder supporting piece are fixedly connected to the periphery of the discharging opening, and a mounting piece is fixed beside the material frame supporting piece. A discharge hole is formed on one side surface of the rack, a discharging hopper is arranged between the unloading port and the discharging port, and a belt through hole is formed beside the discharging air cylinder supporting piece. The instrument vehicle base plates are fixed to the two sides beside one edge of the belt through hole, a motor supporting piece is fixed to the bottom of the rack, a motor is fixedly connected on the motor supporting piece, and amain belt wheel is fixedly connected to the end of an output shaft of the motor.