The present invention relates to a hydraulic excavator comprising a housing (12) provided with a clamp (2) of an excavator (1) and covering an upper surface and a side surface； A front cover 22 installed on the front surface of the housing 12 and guiding the inflow of the weeds into the inside of the housing 12； A discharge guide (24) installed on the rear surface of the housing (12) for guiding the weeds cut inside the housing (12) to the outside； A rotating shaft (30) installed inside the housing (12) and receiving high hydraulic power of the excavator and rotating at a high speed； A cutting means (32) installed along the outer surface of the rotary shaft (30) for cutting weeds flowing into the housing (12)； And a cutting member (50) slantly installed in the inside of the housing (12) for removing weeds and barks wound on the rotary shaft (30) so as to be long left and right along the rotary shaft (30) <； / RTI >； According to the present invention, a cutting member is provided so as to protrude from the front upper end of the rotating shaft, and the weed tangling to the rotating shaft is automatically cut by contacting with the cutting member by the rotational force of the rotating shaft, It is possible to prevent damage to the rotating shaft and breakage of the hydraulic device due to overload. Further, since the cutting blade is formed of a plurality of cutting blades of the cutting member, it is possible to replace the broken cutting blade without replacing the entire cutting member when the cutting blade breaks due to impact and wear, so that the repairing time can be shortened and unnecessary cost can be saved There is an effect that can be.본 고안은 굴삭기(1)의 클램프(2)가 설치되며, 상부면과 측면을 덮는 하우징(12)과； 상기 하우징(12)의 전면에 설치되어, 상기 하우징(12)의 내부에 잡초의 유입을 안내하는 전방커버(22)와； 상기 하우징(12)의 후면에 설치되어, 상기 하우징(12)의 내부에서 절삭된 잡초를 외부로 가이드하는 배출가이드(24)와； 상기 하우징(12)의 내부에 설치되며, 굴삭기의 유압동력을 전달받아 고속으로 회전하는 회전축(30)과； 상기 회전축(30)의 외면을 따라 설치되며, 상기 하우징(12)의 내부로 유입되는 잡초를 절단하는 절단수단(32)과； 상기 하우징(12)의 내
