Large rotary cutting machine equipped with positioning assembly

The invention relates to a cutting machine. The purpose of the invention is to provide an improvement of a large rotary cutting machine, which should have the characteristics of good processing quality, low production cost and good economic benefits. A large rotary cutting machine equipped with a positioning assembly includes a conveying frame for conveying cylindrical raw materials to a cutting portion, a swing arm with one end being rotatably positioned on the frame and with the other end being used for positioning a cutting cutterhead capable of rotating, and a power assembly mounted on theframe and driving the swing arm to perform rotary motion so as to enable the cutting cutterhead to transversely cut the cylindrical raw materials at regular times. The cutting machine is characterized in that the positioning assembly for pressing the cylindrical raw materials is mounted on one side of the conveying frame, and a sensor for being electrically connected with the positioning assemblyand used for monitoring w