The invention relates to a manipulator device for square bar transferring, and belongs to the field of semiconductor crystal silicon processing equipment. The manipulator device comprises a transfer frame, wherein a gripper bracket assembly is slidably connected to the transfer frame, and the lower portion of the gripper bracket assembly is slidably connected with a gripper base plate assembly; and the lower portion of the gripper base plate assembly is provided with at least one square bar clamping unit, and the square rod clamping unit is in sliding connection with the gripper base plate assembly. Position adjustment in three vertical orthogonal directions of an X-axis, a Y-axis and a Z-axis is achieved while square bars are clamped so that the square bars with different lengths and widths can be grabbed, and the manipulator device has the characteristics of high repeated positioning precision and wide application range.