Dual redundant arbitration apparatus for hot backup computer

The present invention discloses a dual-redundant arbitration apparatus for hot backup computer, comprising: arbitration controller (7), the condition monitoring unit (5) and a switch network (8), further comprising: a landmark information synchronizer ( 6), IO switching module (10), RS422 switching module (11), KVM switching controller (9), the work of the host interfaces dual port RAM (3) dual-port RAM and a backup host interface (4). The initial stage of Dual redundant hot start operating the computer, the arbitration means determines one work shift in the host and the host backup host, the second is synchronization start; during operation after startup, the arbitration apparatus of one of the work and backup host and host data synchronization task synchronization, two hosts shift switching operation is based on the status monitoring result. The present invention satisfies display and control units equipped with modern ships supporting the demand for dual-redundant hot backup computer manipulation capabilities and real-time.