Abstract: Fischer-Tropsch wax was divided into light wax oil and heavy wax oil fractions under vacuum distillation. The self-made W-Mo-Ni catalyst was used to hydrogenate the oxygenated compounds and the olefins in samples to prepare the Fischer-Tropsch waxes with low oil content and high drop melting point. The effects of reaction temperature and pressure on the oil content of refined wax were studied. The carbon number，molecular structure and crystal structure of samples were analyzed by high temperature gas chromatography，Fourier transform infrared spectroscopy and XRD. The results showed that under the hydrotreating reactions at 6.0 MPa，260 ℃ for the light wax oil，and at 320 ℃ for the heavy wax oil，the oxygen removals of the two Fischer-Tropsch wax fractions were 95.86 % and 94.90 %， the melting points of 72 ℃ and 112 ℃，oil content of 0.76 % and 0.09 %, and carbon number distributions of 19-29 and 26-120，respectively.The FT-IR analysis indicated that the hydrotreated wax mainly composed of long chain normal paraffins.

Key words: Fischer-Tropsch wax, catalyst, hydrotreating, refined wax