Novel excavator caterpillar track section

The utility model discloses a novel excavator caterpillar track section which comprises a plurality of excavator caterpillar track section sets which are sequentially connected in series, every two adjacent excavator caterpillar track section sets are rotationally connected through a connecting shaft, each excavator caterpillar track section set comprises a tooth block and two connecting plates, a rectangular tooth opening is formed in the center of each tooth block, and the tooth opening is connected with the tooth block. One side of the tooth block is fixedly connected with the two connecting plates, two notches are formed in the other side of the tooth block, and the connecting shaft comprises a first external thread section, a first polished shaft section, a second external thread section, a second polished shaft section and a third external thread section which are coaxially connected in sequence; a first internal thread section matched with the first external thread section, a second internal thread sec