The present invention provides a weed whacker for heavy equipment, comprising: a pair of bodies each having two shaft holders； a pair of rotating members rotatably coupled to the shaft holders between the bodies； a cover coupled to upper ends of the bodies to cover upper portions of the rotating members； a clamp installed on the cover to be coupled to heavy equipment； and a pair of hydraulic motors formed on one side of the clamp to rotate the rotating members by a power transmission means. The rotating members each have: a shaft； a plurality of discs fitted and coupled to the shaft and distanced from each other at predetermined intervals； a shaft bar through-hole formed in an edge side of each disc； and a hitting blade fitted on the shaft bar, and formed between the discs to cut scrub. The present invention can mow grass, by using an excavator or the like, in a steeply inclined place, a harsh environment, or a place in which scrub of a size that cannot be removed by a conventional weed whacker grows, uses vertically rotating blades (hitting blades) without using horizontally rotating blades and rotates the pair of rotating members in opposite directions so that, when the hitting blades of one of the rotating members hit grass or scrub to one side in cutting the scrub, that is, the grass or scrub is tilted to one side, the hitting blades of the other rotating member cut the grass or scrub while hitting the same, thereby achieving very high cutting efficiency, and allows the shaft bar to be fitted on a shaft bar fixture and coupled by a bolt so that the shaft bar is removed to the outside of the body when the bolt is unfastened, thereby enabling a user to easily replace damaged or worn hitting blades.COPYRIGHT KIPO 2020본 발명은 두개의 축거치구를 각각 구비하는 한쌍의 본체와, 상기 본체의 사이에 축거치구에 의해 회전가능토록 결합되는 한쌍의 회전구와, 상기 회전구의 상부를 덮기 위해 본체 상단에 결합되는 덮개와, 상기 덮개 위에 설치되어 중장비에 결합되기 위한 클램프와, 상기 클램프의 일측에 형성되어 동력전달수단에 의해 회전구를 회전시키기 위한 한쌍의 유압모터로 이루어지되, 상기 회전구는 축과 상기 축에 끼워져 결합되고 소정 간격 이격되어 형성되는 다수개의 원판과
