the dry mixing method will measure the iron, molybdenum metal salt and activity according to the formula & gamma;-Al2O3 powder is placed in a ball mill and mixed evenly, then adhesive, lubricant and appropriate amount of water are added to the mixture, and then mixed evenly again, pressed into tablets, and finally calcined to obtain iron molybdenum catalyst. Strip or spherical activity & gamma;-Al2O3 carrier is prepared in advance by impregnation method, and then nickel borate and ammonium molybdate (cobalt nitrate is added to the JT-1 type) and desalted water are prepared into a solution with a certain concentration. Soak the carrier in this solution, take it out after a certain period of time, and then drain, dry, and calcine to prepare a nickel-molybdenum hydrogenation catalyst.