The invention provides a high strength compact foam silicon carbide ceramics material and the prodn method. Counting on weight percentage, the material is composed by silicon carbide 90-98 and silicon 10-2, silicon carbide powder and resin with high carbon-producing ration are mixed to slurry, expanded plastice is cut and soaked in the slurry, which is taken out, removing unnecessary slurry, then is treated by semisolidifying, high-temp, high-pressure solidifying, the solidified foam body is pyrolized to obtain foam carbon frame with same shape as original foam shape composed by silicon carbide and pylolized carbon, to open a centre hole on carbon frame by grinding, the silicon slurry is injected into the centre hole until filling by press injection, then is pylolized, by silicizing process, carbon in the carbon frame and gas or liquid phase silicen are reacted to generate silicon carbide and combined with original silicon carbide particles in carbon frame, thus to obtain high strength compact silicon carbide foam ceramics.