Accurate analysis of Fischer-Tropsch (FT) products is very important for reaction mechanism and kinetics studies. However, it is rather complex since many factors in collecting, measurement and GC analysis have influences on the results. These factors should be considered in research to avoid possible artifacts. In this paper, some issues and considerations in FT products analysis were discussed. To obtain reliable results, it is recommended to collect samples after the steady state of the reaction reached without further catalyst reconstruction and net products accumulation. Products collection fraction should be in acceptable range besides commonly calculated balances. The physical separation of different phases of products should be as complete as possible and the identification of different products in GC analysis should be checked carefully.