Cutter bar of cutter and cutting tool

The cutter bar comprises a bar body, one end of the bar body is provided with a locking part, the other end of the bar body is provided with a tail end part, and the cutter bar is characterized in that a shell is arranged between the locking part and the tail end part; the invention further comprises a honeycomb structure located in the shell, the honeycomb structure is formed by connecting a plurality of hexagonal holes, a supporting wall is arranged between every two adjacent hexagonal holes, the supporting walls are connected between the locking part and the tail end part and are parallel to the center line of the rod body, and the supporting walls among every three adjacent hexagonal holes intersect to form an interconnection part. On the premise of meeting the rigidity and strength requirements required by tool machining, the weight of the modular tool is greatly reduced, the power loss of a machine tool is reduced, tool dynamic balance control in the tool machining process is facilitated, the machining