The present invention relates to: a brush cutter driving apparatus capable of cutting grasses and weeds by crossing each of blades by rotating, in the opposite directions to each other, the plate-shaped blades which are vertically installed a brush cutter driving apparatus which is applied with a bevel gear and which is capable of improving brush cutter performance and increasing the durability of the brush cutter by applying a bevel gear so that the load that is transferred to a brush cutter engine is minimized and the rotating force of the blades is increased and to a brush cutter driving apparatus applied with a bevel gear, a method for a driving brush cutter blade, and the structure of a brush cutter blade. The brush cutter driving apparatus is equipped with a bevel gear which rotates the vertically installed blades which cut grosses and weeds by connecting with a driving shaft, and a bevel gear is applied so that an internal gear shaft and an external gear shaft rotate in the opposite directions by driving an internal gear and an external gear which rotate by engaged with a main gear by driving force transferred through a driving shaft, thereby reducing vibration and noises during high speed driving. A bevel gear is applied for driving the internal and external gear shafts in the opposite directions, and the structure is simply configured to reduce the weight of the brush cutter, thereby minimizing fatigue during working. When grasses and weeds to be cut are cut, force is offset at a peak point when a stone other than a subject to be cut is bumped when an upper blade and a lower blade are driven in the opposite directions, thereby safely driving the brush cutter driving apparatus.COPYRIGHT KIPO 2014본 발명은 상하 설치되는 판 형태의 칼날을 상호 반대 방향으로 회전시켜 각각의 날의 교차에 의해 풀이나, 잡초의 절단이 이루어질 수 있도록 하는 예초기 구동장치에 관한 것으로서, 칼날의 회전력을 증가시킴과 동시에 예초기 엔진으로 전해지는 부하를 최소화하도록 베벨기어를 적용하여, 예초기 성능의 향상 및 내구성의 증가를 얻을 수 있도록 하는 베벨기어를 적용한 예초기 구동장치에 관한 것으로서, 풀이나 잡초를 절삭하는 상· 하부 칼날의 회전을 구동축과 연결 구성되어 구동하는 베벨기
