The　bond　breakage　on　the　rake　face　of　cemented　carbide　inserts　has　a　significant　impact　on　the　life　of　the　insert.　The　problem　of　cemented　carbide　insert　bonding　damage　is　analyzed,　and　the　main　failure　mode　of　cemented　carbide　insert　is　brittle　fracture.　Based　on　the　extended　finite　element　method　(XFEM)　and　cohesive　technology,　and　according　to　the　stress　state　of　cemented　carbide　insert　in　different　cutting　states　and　the　position　of　adhesion　layer,　the　actual　boundary　conditions　are　set　in　ABAQUS　simulation　environment.　The　three-dimensional　macroscopic　simulation　model　with　crack　structure　and　load-bearing　capacity　that　meets　the　actual　working　conditions　is　established,　and　the　influence　of　no　cracks,　single　cracks　at　different　angles,　multiple　cracks,　and　load　on　the　peeling　of　the　adhesion　layer　are　analyzed.　Regardless　of　whether　it　is　in　the　state　of　no　pre-crack　or　multiple　cracks,　the　rake　face　is　damaged　when　the　adhesive　layer　is　subjected　to　a　shear　load　parallel　to　the　rake　face,　which　is　similar　to　the　experimental　results.　while　in　the　single　crack　state,　the　position,　angle　and　load　direction　of　the　crack　do　not　show　excessive　sensitivity　to　the　peeling　of　the　adhesion　layer,　which　provided　a　theoretical　basis　for　revealing　the　essential　reason　for　the　bond　failure　effect　of　cemented　carbide　inserts.