The invention relates to a process for the simulative continuous counter-current absorption of ketene by acetone, which is characterized in that: at least three reactors are arranged, wherein reaction materials, namely the acetone and catalysts are added into the reactors; two reactors are connected in series for reaction and another one reactor is for later use; the three reactors are switched to perform operation in turn; a stirring paddle of each reactor adopts a closed-type bent-blade disk turbine paddle; the simulative continuous counter-current absorption of the ketene is realized through negative pressure; a condenser and a gas-liquid separator are arranged at the back stage of each reactor; gas phase generated during the reaction of the reactors is condensed by the condenser and separated by the gas-liquid separator; and liquid phase flows back to the reactors and the gas phase enters the next-stage reactor. The process has the advantages that: the ketene is absorbed by the negative pressure which is generated by stirring the closed-type bent-blade disk turbine paddle, so the ketene gas delivery pressure and the autopolymerization reaction are reduced, the stirring efficiency is high, and the dispersion effect is good even if thickened catalysts such as ASA and the like exist. A plurality of reactors can be connected in series when necessary to form a certain concentration gradient so as to realize the counter-current absorption.