The invention provides a preparation method for a dipping solution and the dipping solution prepared by using the preparation method. The preparation method comprising the following steps: (1) preparing a first solution including at least one compound containing a group VIII metal and at least one compound containing a first group VIB metal; (2) subjecting the first solution to normal-pressure activation at a temperature of 65 to 100 DGE C for 0.5-36 hours; and (3) after the temperature of the activated first solution drops to a range of room temperature to 50 DEG C, introducing at least one compound containing a second group VIB metal so as to obtain the dipping solution. Compared with the prior art, a hydrogenation catalyst prepared by dipping a carrier with the dipping solution provided by the invention has obviously improved hydrorefining or hydrotreating performance.