Method and device for main and standby competition

The invention discloses a method for a main and standby competition, comprising the following steps of: intelligently starting a main and standby competition, judging whether a single board has a main state identity or not, judging whether a slot position that the single board is located is a set main slot position if the single board has a main state identity; judging again whether the slot position that the single board is located is the set main slot position after delaying for a second time slot if the single board does not have a main state identity, if so, joining in the main and standby competition immediately, and otherwise, joining the main and standby competition after a first time slot; recording the main state identity per se by the main single board when the main and standby competition is over. The invention also discloses a device for a main and standby competition, which consists of a slot position judging module, an identity detecting module, a delay setting module, a main and standby competi