The invention provides a preparation method of (TiV)C steel bond hard alloy. Titanium and vanadium whose ratio is 1:1 are prepared, and a mixture and graphite powder are prepared into in-situ synthesized (TiV)C mixed powder, wherein the atomic mole ratio between C and Ti+V is 0.7-1.1; ferrovanadium powder, ferrochromium powder, ferromolybdenum powder, ferroboron powder, ferrous powder, ferrosilicon powder, ferromanganese powder, nickel powder, copper powder, colloidal graphite and a rare earth raw material are prepared according to a required mass ratio of bonded-phase metal chemical components, ball-milling is carried out by a steel ball, absolute ethanol as a medium and PVA (polyvinyl alcohol) are added, after the ball-milling is finished, slurry is dried and pressed for forming, and the steel bond alloy is obtained. In situ reaction synthesis technology and liquid phase sintering technology are combined, and the (TiV)C steel bond hard alloy is prepared. (TiV)C is synthesized in situ in a substrate through reaction in the sintering process, the fineness of particles is improved, no sharp angle is formed on the surface, and a substrate interface is relatively good in adhesion and clean. The comprehensive mechanical property of the alloy can be improved, the price is low, and the process is simple and convenient.