The invention relates to a method for continuously producing isobutyl alcohol through hydrogenation of methylacrolein. The method is characterized in that: methylacrolein is taken as a raw material, and isobutyl alcohol is obtained through a hydrogenation reaction in the presence of an A-X type metal load type catalyst; the active component A in the A-X type metal load type catalyst is one of nickel, palladium, platinum or copper, and the carrier X is selected from one of ZSM-5 molecular sieve, mordenite, SiO2 and Al2O3; and a methylacrolein hydrogenation reactor used in the method is an thermal insulation fixed-bed reactor provided with a plurality of sections of catalyst bed layers inside. Compared with the prior art, the method has the advantages of simple process flow, low energy consumption, low material consumption, convenient operation, good product quality, and the like. The method is suitable for the realization of large-scale industrialized production of isobutyl alcohol.