The invention relates to the field of power tools, and discloses a mechanical arm type live working instrument; the mechanical arm type live working instrument comprises a tool kit, two mechanical arms, and two fixing hands, wherein power management equipment and control equipment are arranged in the tool kit; the two mechanical arms are respectively arranged outside the left and right opposite surfaces of the tool kit; and the two fixing hands are respectively arranged outside the front and rear opposite surfaces of the tool kit. The mechanical arm type live working instrument provided by theinvention adopts two mechanical arms to replace manual operation, the high intelligentization and automation are realized, so that workers can complete the task quickly and safely, the working time is greatly shortened and the work efficiency is improved.