Mechanical arm device

The utility model discloses a mechanical arm device. The mechanical arm device comprises a translation beam structure, a longitudinal translation trolley component, a transverse translation trolley component and a mechanical arm device body. The translation beam structure comprises a main beam, a supporting column, a first guide rail, a rack and a supporting beam. The supporting column and the supporting beam are fixedly connected to the lower portions of the two ends of the main beam respectively, and the first guide rail and the rack are fixedly embedded in the same side of the main beam through bolts. When the mechanical arm device clamps and conveys materials, direction precision is higher, conveyed power is higher, and the mechanical arm device is novel.