The work aims to study effects of curing temperature and curing time on grinding performance during curing process of grinding wheel. The effects of curing temperature on grinding performance of magnetic control micro powder grinding wheel were evaluated by testing changes in compressive strength, hardness of grinding wheels prepared by adopting two curing processes, grinding ratio, surface roughness and form accuracy of processed cemented carbide YG8 as curing temperature changed. Grinding performance of grinding wheel had direct relation with its curing temperature and time. The grinding ratio tended to rise first then decline as the curing holding time prolonged. Curing rate of grinding wheel and its sensitivity to excessive curing were determined by curing temperature. Optimal grinding performance could be achieved quickly at the curing temperature of 170 ℃, but grinding performance declined rapidly as the curing time exceeded 8 h. Curing at 130 ℃ might prevent sharp degradation of grinding performance caused by over-curing. The grinding wheel exhibited optimal grinding performance provided with the curing process of 170 ℃/5 h+130 ℃/5 h. A mirror surface with optimal surface roughness of 3 nm in Ra and optimal form accuracy of 365 nm in PV was obtained by grinding YG8. In the curing process of grinding wheel, curing temperature and curing time directly affect curing reaction rate and curing degree of resin, optimal curing process parameters are obtained under the experimental condition based upon experimental study of curing process.