Abstract: Aiming at the big swing amplitude of ultra thin resin integrated cutting wheel the effect of adding carbon fibre, glass fibre and their mixture on the mechanical and cutting performance of the cutters was studied by cutting experiment, and the mechanism that affect the amplitude was studied and analyzed. Results show that the addition of carbon fiber is beneficial to improve the bending strength of grinding wheel, and the addition of glass fiber is beneficial to reduce the cutting resistance of grinding wheel. The combination of carbon fiber and glass fiber can effectively reduce the cutting swing amplitude of grinding wheel. When adding 15% carbon fibre (φ7.6 μm, length of 100 μm) and 5% glass fibre (φ15 μm, length of 120 μm), the amplitude can be effectively decreased to 0.006 7 mm, which satisfies the production requirement.