The invention provides thermal conductive graphite blocks for a blast-furnace bottom and a hearth, belonging to the technical field of carbon refractory. The raw materials of the graphite blocks comprise the following components in parts by weight: 11-15 parts of petroleum coke with grain size of more than 2mm and less than or equal to 4mm, 10-14 parts of petroleum coke with grain size of more than 1mm and less than or equal to 2mm, 53-60 parts of petroleum coke with grain seize of more than 0.075mm and less than or equal to 0.15mm, 34-40 parts of petroleum coke with grain seize of less than or equal to 0.075mm, and 22-25 parts of mesothermal asphalt. In the formula of the thermal conductive graphite blocks for the blast-furnace bottom and the hearth, high-quality needle cokes with higherintensity and easy graphitization are used, a small grain formula is adopted, and a high-pressure multi-soaking and multi-baking method is adopted, so that an impregnant can penetrate through the holes of the graphite blocks, thus reducing the porosity of the graphite blocks, improving the compactness, volume density and intensity of the products, improving the coefficient of heat conductivity and alkali-resistant corrodibility of the graphite blocks greatly, fundamentally solving the problem of low coefficient of heat conductivity of the graphite blocks, and meeting the requirement on quality of the graphite blocks with high thermal conductivity for large blast furnaces.