The invention discloses a method for inhibiting trailing current and preventing malfunction protection maloperation. The method comprises the steps of processing fault current through a differential filtering algorithm to obtain first current data; processing the fault current through a full-cycle Fourier algorithm to obtain second current data; processing the first current data through half-waveintegration to obtain third current data; and judging whether the third current data and the second current data simultaneously meet a malfunction action threshold, and starting a malfunction protection action if the third current data and the second current data simultaneously meet the malfunction action threshold. The method disclosed by the invention is suitable for the situation that the relayprotection secondary current transformer has 'trailing current' after the short-circuit fault occurs in the power system, the influence of the trailing current can be effectively reduced, and malfunction protection maloperation can be prevented.