The invention discloses a method for preparing aniline through low-temperature liquid-phase catalytic hydrogenation. The method comprises the following steps of: filling a supported noble metal catalyst into a reactor, wherein the supported noble metal catalyst adopts Pt as an active ingredient and Al2O3 as a carrier; feeding a nitrobenzene organic solution and hydrogen into the reactor, respectively; controlling the reaction temperature to 70 to 105 DEG C, reaction pressure to 3 to 6Mpa, and feeding airspeed of the nitrobenzene organic solution to 0.3 to 1.3h<-1>; and then carrying out liquid-phase catalytic hydrogenation to obtain the aniline. An organic solvent is one of aniline, ethyl alcohol or acetone; and the organic solution contains 1 to 20% in mass fraction of nitrobenzene. According to the method, eggshell type Pt/Al2O3 is adopted as the catalyst for performing liquid-phase catalytic hydrogenation to prepare the aniline, the production process is simple, the reaction condition is mild, and the energy consumption is low; and the method also has the characteristics of being low in catalyzing cost, high in conversion rate of the nitrobenzene, and high in selectivity.