The invention discloses a verification circuit and device for operation logic and switching tripping and a closing time-delay fixed value of a spare power automatic switching device. The verification device comprises a relay control loop and a device operation panel. The relay control loop consists of an inlet wire I switch control branch circuit, an inlet wire II switch control branch circuit, an inner bridge switch control branch circuit, a timing logic function and indication branch circuit, and a timer and no-voltage relay circuit. The device is connected with all operation contact points of a spare power automatic switching device by the device operation panel; and all switching positions and post-closing positions are simulated. Because of a bus voltage determination function, the verification function of the spare power automatic switching operation logic and tripping and closing delay time of all switches can be completed automatically based on determination of the relay control loop only by drawing and closing the field bus voltage air switch; the verification time of the spare power automatic switching device is shortened; the check and repair labor force is saved; and the time of the spare power automatic switching device put into operation is accelerated.