The invention discloses a method for adsorbing tobacco-specific nitrosamines in tobacco power of snus. The method comprises the following steps that S1, the particle size of an adsorbing material foradsorbing the tobacco-specific nitrosamines (TSNA) is ground to 300-500 meshes for standby application; S2, an appropriate amount of water is added outside the tobacco power so that the moisture content of the tobacco power can be 30-50% to exhibit a wet state, and the treated tobacco power is sealed; S3, the adsorbing material is added to the treated tobacco power in the step S2 and evenly mixed,the sample is sealed and left for a period of time, so that the adsorbing material gradually adsorbs the TSNA in the tobacco power; and S4, after the adsorption is completed, the sample is dried in the air or dried by baking. Compared with the prior art, the method utilizes the wettability of the surface of the tobacco power to promote the high spread-dispersion of adsorbing particles, so that the TSNA in the tobacco power escapes outward, the adsorption performance of the adsorbing material on the TSNA is improved, energy and time are saved, environmental pollution is reduced, cost is reduced, and economic and social benefits are significant.