The utility model discloses a convenient lifter arm device of unloading, including lifter arm, the inside cylinder no. 1 that is equipped with of lifter arm one end, telescopic link bi -pass are crossed telescopic link no. 1 and are connected with cylinder no. 1, and two upper ends of telescopic link are connected with the one end of lifter plate, and two tops of telescopic link are equipped witha pushing mechanism, and on a pushing mechanism lay in the slurcam, the lifter plate was kept away from a thrust unit's one end and is connected through the pivot no. 1 and lifter arm's the other end,is equipped with the 2nd thrust unit below slotting. The beneficial effects of the utility model are that: through set up the lifter plate above lifter arm to the lifter plate that can rise when placing object expects makes the material move down, and then makes more smooth the placing of material stack the department, through setting up a thrust unit and the 2nd thrust unit, thereby makes the material can be more high -efficient swift with the help of a thrust unit and the 2nd thrust unit when moving down, and then reduces the material and stack the used time, and then improved lifter arm'swork efficiency.