Large rotary cutting machine provided with positioning assembly

The utility model relates to a cutting machine. The utility model relates to a large rotary cutting machine and aims to provide an improvement of the large rotary cutting machine. The large rotary cutting machine has the characteristics of good processing quality, lower production cost and excellent economic benefit. According to the technical scheme, the large rotary cutting machine with the positioning assembly comprises a conveying frame for conveying cylindrical raw materials to a cutting part, a swing arm with one end rotatably positioned on a rack and the other end positioned on a cutting knife disc, and a power assembly which is mounted on the rack and drives the swing arm to do rotary motion so as to enable the cutting knife disc to transversely cut the cylindrical raw materials atregular time. The device is characterized in that a positioning assembly for pressing the cylindrical raw materials is installed on one side of the conveying frame, and a sensor electrically connected with the positioning as