The present invention relates to a heavy-duty cost cutting apparatus, and the present invention is detachably installed and fixed through a quick coupler connected to an end of an excavator. Thus, unlike a conventional cutting apparatus installed on a farm machinery, It is possible to easily improve the working efficiency and to easily use the heavy equipment such as the excavator to use it. Thus, it is possible to easily perform the weeding operation of cutting the vegetation even in sloping slopes of rivers and rivers, The purpose of the The heavy-duty cost cutting apparatus according to the present invention constituted for this purpose is detachably installed and fixed through a quick coupler connected to an end of an arm of an excavator which is a heavy equipment, and also has a structure in which a vegetation is placed on a sloping slope of a river, A cutting apparatus according to claim 1, characterized in that the cutting apparatus is provided with a plurality of mounting pins, which are provided in a plate shape and are fixed in a longitudinal direction between mounting brackets facing each other on an upper side, An upper plate selectively fixedly coupled to the quick coupler and having a motor installed at a central upper portion of the motor, Wherein the fixing bar is fixedly installed at predetermined intervals along the circumference facing the upper plate to fix both ends of the fixing bar through a fixing member so as to be spaced apart from the upper plate at a predetermined interval, A lower plate installed to penetrate through the center； An upper end fixedly installed on one side of the upper plate, a lower end fixedly installed to be rotatable through one side of the lower plate, and interlocked with the driving shaft, A power transmission unit that is provided across the drive shaft and the interlocking shaft and transmits the rotational driving force of the driving shaft to the interlocking shaft when the motor is driven to cause the interlock
