The invention relates to a BCD gear information collection method for an intelligent substation. The method comprises the steps that idle contact signals participating in the composition of BCD are collected in real time at first; if the state of more than one idle contact signal changes within the set time T, the starting moment of the T is updated, the state changing moment of the last idle contact signal with the state changed is taken as the corresponding starting deflection moment t of the BCD value, the starting deflection moment t of the BCD value is taken as the shake disappearing moment to delay one shake disappearing time Tx, the states of the idle contact signals are confirmed after the shake disappearing time Tx is over, and then the BCD value is determined. According to the BCD gear information collection method for the intelligent substation, the BCD gear information is sent once through a GOOSE message only after the states of all the idle contact signals are stable, unnecessary network message transmission is avoided, and the burden of an upper-layer device is effectively reduced.