Dispersion strengthened tungsten with nano-tantalum carbide (TaC) was prepared by Spark Plasma Sintering (SPS) process at 1700 ℃ for 1 min. The results show that the grain size of tungsten will be larger if the particle size of tungsten powder is larger. When the particle size of tungsten powder is 3 μm, the grain size of tungsten is 22.19 μm. And then, with the increase of TaC content, the grain size of tungsten will be finer. When the particle size of tungsten powder is 200 nm and the content of TaC is 4%, the grain size of sintered tungsten is about 5.91 μm. It also can be seen that TaC is spherical, it exists at grain boundaries of the sintered tungsten. Some transgranular fracture can be seen in fracture surface of pure tungsten by SPS, but it is mainly intergranular fracture in fracture surface of dispersion strengthened tungsten with nano-tantalum carbide