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A 92WC-8Co powder mixture with 33 nm WC grains was prepared by strengthening ball milling and was then sintered by spark plasma sintering (SPS) at 1000- 1200℃ for 5-18 min under 10-25 kN, respectively. Movement of the position of low punch shown shrinkage of the sintered body began above 800℃. The shrinkage slowly rose as the temperature rose from 800 to 1000℃ and then quickly rose at above 1000℃ and then gradually rose at above 1150℃. The densities of the samples increased with an increase in sintering temperature, rapidly below 1100℃, and then gradually above 1100℃.WC grains grow gradually with increasing sintering temperature. The powder was sintered to near full density at 1100℃ for5 min under 10 kN. The best result of the sample with 275 nm WC grains and no pores was obtained at 1150℃ under 10kN for 5 min. The research found the graphite die had a function of carburization, which could compensate the sintered body for the lack of carbon, and had the normal microstructure.