A series of high melting point Fischer-Tropsch wax products with a melting point of 70-110 ℃ were obtained by solvent extraction,using the Fischer-Tropsch crude wax obtained from the indirect liquefaction demonstration device of Ningxia coal as the raw material. In order to improve the chromaticity of the high melting point Fischer-Tropsch wax,the relationship between the chromaticity and the drop melting point of wax with high melting point was studied. Two types of adsorbents including activated clay and activated carbon,were used to adsorb and decolorize the No.110 wax samples with poor color,and the best decolorization process conditions were selected. Then,the material composition and physical and chemical properties of the wax-like products and adsorbents before and after decolorization were compared through a series of characterization tests such as high temperature simulation distillation,N2 absorption and desorption,flourier transform infrared spectrometer (FTIR),diffraction of X-rays (XRD),thermogravimetric analysis,element analysis,inductively coupled plasma atomic emission spectrometer (ICP-AES),nuclear magnetic resonance (13C-NMR and 1H-NMR),etc. It can be found that the decolorization effect of activated clay is better than that of activated carbon,and the Saybolt color number of the No.110 wax product with high color value is +16. The reasons for the poor chromaticity of high melting point wax are not only the inorganic components mainly composed of residual ultrafine catalyst particles,but also the organic components of unsaturated carbon-carbon double bonds,heteroatomic compounds containing oxygen,nitrogen,and sulfur. The oxidative deterioration of the unsaturated carbon-carbon double bond and the broken bond of hydrocarbons with low bond energy,and the oxidation of sulfur and nitrogen heteroatom compounds may be the main reasons for the color reversion of the products after decolorization.