The invention discloses a method for quickly recovering power supply of a GIS (Gas Insulated Switchgear) bus device after tripping. The method comprises the following steps of primarily judging a failure point position and the type of the failure after a power grid has a failure; isolating a failure interval of the failure point or a bus according to the specific failure position of the failure point before recovering power supply of other components; trying to supply power for components without failure in the primary judgment. The method has the beneficial effects that a scheme of trying to supply power and quickly recovering power supply after the GIS bus is power off is provided, the position of the failure is intelligently diagnosed after the bus is tripped, the temporary protection set value does not need to be modified and recovered when trying to supply power for the components, only the position of a circuit or a main transformer isolation switch is needed to be accurately set, thereby ensuring that the protection actions are taken quickly and reliably for cutting the failure when the process of trying to supply power has a failure.