Abstract: Four different modified phenolic resins (PFs) for resin bonded superhard wheel were selected to explore the performance of resin bond. The different matrices were prepared using the modified resins. The decomposition temperature, the mechanical performance and the micro structure were analyzed with the comprehensive thermal analyzer, universal testing machine, Rockwell hardness tester and ultra depth filed microscope. The results show that the thermal decomposition temperatures of different modified PFs are 552, 527, 557 and 457 ℃. It is also found that the maximum Rockwell hardness comes from Resin 3031, namely 64, while the minimum hardness is from Resin 3034, namely 41, only 64% of that of 3031, and that Resin 3031 has the largest bending strength, 87 MPa, while Resin 3034 has the smallest bending strength, 50 MPa, 57.5% of that 3031.