Abstract: To study the effect of high temperature performance of carbide on CFRP cutting, two kinds of WC-Co based fine grain carbide materials with same main elements were prepared.The material A was added with trace TaC (NbC), and materials B did not add trace elements.High temperature hardnesses of two kinds of carbide materials were testing by high temperature Vickers hardness tester, and the CFRP was milling processed by the fine-cross-nick routers that were made of these two materials.The results showed that abrasive wear was the main reason of tool wear when the CFRP was milling processed by the fine-cross-nick router.The high temperature hardness of material A was higher than material B.Under the same using conditions, the wear resistance of material A was better than that of material B, the tool made of material A had a longer tool life, and more suitable for CFRP machining.