PURPOSE: A hay cutting apparatus for a fodder mixer is provided to prevent the slip of hay in the inner surface of the mixer by installing a skid-proof part in the inner surface of the mixer.CONSTITUTION: A hay cutting apparatus for a fodder mixer comprises: a main body(110) in which stock fodder is injected an auger screw(120) which is installed below the main body in a rotatable manner, and cuts hay injected into the main body and a skid-proof part(130) which is installed within the main body to be positioned between the main body and the auger screw, and prevents the slip of the hay by supporting the hay to be cut through the rotation of the auger screw. The skid-proof part has a supporting bar(131) which is connected to the inner surface of the main body in order to be arranged with a gap along the longitudinal direction of the auger screw. The supporting bar comprises a first supporting bar member(131a) which is arranged with a gap along the longitudinal direction of the auger screw and a second supporting bar member(131b) which is also arranged with a gap along the longitudinal direction of the auger screw so as to be positioned in a spaced part of the first supporting bar member. The first and second supporting bar members have a rectangular shape, and are bonded to a guide part of the main body by welding.COPYRIGHT KIPO 2013본 발명은 배합기의 내면에 건초의 미끄럼 현상을 방지하기 위한 미끄럼 방지부를 설치하여 건초의 절단효과를 크게 향상시킬 수 있을 뿐만 아니라, 배합기의 마모를 줄일 수 있 사료 배합기용 건초 절단장치에 관한 것으로, 내부에 축산 사료가 투입되는 본체 상기 본체의 하부에 회전가능하게 설치되며, 상기 본체의 내부로 투입되는 건초를 절단하여 배합하는 오거 스크류 및 상기 본체와 상기 오거 스크류 사이에 위치하도록 상기 본체의 내면에 마련되며, 상기 오거 스크류의 회전을 통해 절단되는 건초가 지지되도록 하여 건초의 미끄럼 현상을 방지하는 미끄럼 방지부를 포함한다.