Small steel bar cutting machine

The invention discloses a small steel bar cutting machine. Two steal bar limiting rings and a cutting grinding wheel are installed above a table plate; a crescent fixed limiting piece and a crescent sliding limiting piece are oppositely arranged on the inner side of each steel bar limiting ring; the outer side of the two sliding limiting pieces extend to the exteriors of the corresponding steel bar limiting rings; one end of the outer side of each sliding limiting piece is connected with a reset spring, and the other end of each sliding limiting piece is connected with a steel wire rope; the steel wire ropes are connected to a pedal after performing tensioning and reversing through a pulley block; by treading the pedal, the two steel wire ropes are pulled at the same time, the corresponding sliding limiting pieces are driven to slide along arc-shaped sliding grooves in the steel bar limiting rings, the distances from the arc-shaped sliding grooves to the centers of the steel bar limiting rings are gradually r