The　torque　impactor　can　effectively　solve　the　stick-slip　vibration　of　PDC　bit　in　the　deep　formation,　but　the　wear　of　the　pendulum　seriously　restricted　the　service　life　of　the　impactor.　In　order　to　reduce　the　wear　of　the　pendulum　under　complicated　working　conditions,　the　polycrystalline　diamond　composite　material　was　used　as　the　wear-resistant　material　to　design　the　pendulum　wear-resistant　belt.　Based　on　the　analysis　of　the　feasibility　of　using　polycrystalline　diamond　as　pendulum　wear-resistant　material,　the　finite　element　model　of　dynamic　contact　interaction　between　pendulum　wear-resistant　belt　and　impact　cylinder　was　established,　the　influence　of　the　arrangement　of　wear-resistant　blocks　on　the　stress　of　the　contact　area　between　the　pendulum　wear-resistant　belt　and　the　impact　cylinder　was　studied.　The　results　show　that　polycrystalline　diamond　composite　material　has　stronger　wear　resistance　and　better　anti-friction　performance　than　conventional　wear-resistant　materials,　and　can　reduce　the　wear　of　the　inner　wall　of　the　impact　cylinder,　which　is　feasible　on　the　surface　of　the　pendulum　hammer.　The　use　of　the　wear-resistant　belt　structure　is　beneficial　to　improve　the　variation　of　the　shear　stress　of　the　area　where　the　pendulum　and　the　impact　cylinder　contact　each　other.　The　wear-resistant　belt　structure　is　beneficial　to　improve　the　shear　stress　variation　amplitude　of　the　pendulum　and　impact　cylinder　in　contact　with　each　other.　When　the　wear-resistant　block　is　arranged　in　a　circular　block　staggered　arrangement,　the　shear　stress　change　amplitude　of　the　interaction　contact　area　is　the　largest,　the　triangular　block　staggered　arrangement　mode　is　second,　and　the　trough　block　shape　staggered　arrangement　is　the　smallest.　The　research　results　have　important　reference　significance　for　the　design　and　application　of　polycrystalline　diamond　composite　pendulum　wear-resistant　belt.　©　2019　Trans　Tech　Publications,　Switzerland.