The effect of temperature on the structural changes of petroleum raw coke during calcination was studied and then the properties of carbon solids prepared from those calcined coke using binder were examined. The notable structural change of raw coke was observed in the range from 800$^{circ}C$ to 900$^{circ}C$ from the results of volatile matter, porosity, X-ray diffraction and scanning electron microscopy. The bending strength, density of the carbon solid carbonized at 1400$^{circ}C$ was 400 kg/$ extrm{cm}^2$ and 1.40g/㎤, respectively.