This work mainly describes the process of sorbitol and mannitol conversion to liquid heavier hydrocarbons via reduction with hydriodic acid under mild reaction conditions.The compositions of the obtained products were analyzed using gas chromatography mass spectrometer(GC-MS)and Fourier transform infrared spectrometer(FT-IR).It is found that the products obtained from C6 polyols were mainly C12H16,C12H18,C12H20,C12H22 and C18H26.The yields of heavier hydrocarbons from sorbitol,mannitol,and the mixture of sorbitol and mannitol were 81.1%,73.2%,and 77.3%,respectively.To obtain pure hydrocarbon fuels,the obtained crude oil was treated with potassium hydroxide in an alcohol solution followed by rotary evaporation and vacuum distillation.The final liquid hydrocarbons obtained have a water content of 0.1%,densities of 0.83~0.84g/mL,oxygen content of 2.0~2.2%,and heating values >42MJ/kg at room temperature,which is potentially a good transportation fuel for diesel replacement.