The invention discloses a contact material applied to middle-high-voltage vacuum switch-on/off and a preparation method for the same. The contact material is prepared from the following raw materials in percent by weight: 5-50% of Cr powder, 1-15% of carbide and the balance of Cu powder. Compared with the prior art, the contact material disclosed by the invention has the beneficial effects that a design thought of further distributing a ceramic phase with a higher melting point in the existing copper-based material except a Cr phase with a high melting point is adopted; the ceramic phase has the functions of reinforcing the mechanical performance of the copper-based material and improving the welding resistance of the contact material; and via a hot-pressing sintering process, the compactness of a mixed powder contact is improved, and the material defects of closed pores, enrichment and the like of the mixed powder contact are reduced, thus improving the ablation performance of the contact material. Therefore, the contact material applied to middle-high-voltage vacuum switch-on/off disclosed by the invention is low in resistivity, improved in hardness, mechanical strength and compactness compared with common mixed powder contacts, improved in the voltage-resistant capacity of the mixed powder contact, strong in switch-on/off capacity, and good in welding resistance.