The invention relates to a preparation method for a high-performance fine-grain tungsten material strengthened by trace amounts of nanometer TiC in a dispersion manner. The content of the TiC ranges from 0.1% to 2%, hollowly-spherical-shell-shaped micro-nanometer composite powder with trace amounts of the nanometer TiC evenly distributed in nanometer tungsten grains in a dispersion manner is obtained through ball-milling modification-sol-heterogeneous precipitation and quick spray drying, the grain size of the micro-nanometer composite powder ranges from 10 micrometers to 30 micrometers, then spherical-shell-shaped aggregates are subjected to ball milling and disaggregating, and the nanometer composite powder is obtained; and the formability and sintering activity of the nanometer composite powder are improved, then the composite powder is formed and subjected to two-step sintering successively at the temperature of 1,200 DEG C to 1,690 DEG C and at the temperature of 1,700 DEG C to 1,900 DEG C, vacuum or argon or H2 is adopted as the protective atmosphere, and the high-performance fine-grain tungsten material strengthened by trace amounts of the TiC is obtained. According to the alloy prepared through the method, the relative density of the alloy reaches 99% or above, the tungsten grain size ranges from 1 micrometer to 3 micrometers, the size of TiC grains ranges from 0.05 micrometer to 0.5 micrometer, the TiC grains are distributed at the grain boundary and in the tungsten grains, and the room-temperature tensile strength ranges from 450 Mpa to 600 MPa.