The invention discloses an electricity-verification and grounding operation method for a multifunctional electricity-verification and grounding trolley for centrally installed switchgear. When the trolley is positioned in an operating position, a travel switch S9 is switched on; when the trolley is positioned in a test position, a travel switch S8 is switched on; a primary circuit is fed back to an electrified display according to a high voltage sensor; the primary circuit is not electrified; an auxiliary contact HN is closed; an earthing switch is in a switch-off state; a travel switch S1 is switched on; a switching knob of a button SB1 is pressed; a contactor KM1 coil is powered on; a contactor main contact is switched on; a motor M1 is powered on; the earthing switch begins to be switched on; at the moment, the SB1 is released; the contactor is self-held through an auxiliary contact of the KM1; when the earthing switch is fully switched on, the travel switch S1 is disconnected; the contactor KM1 is in a power-losing state; the main contact is disconnected; the motor M1 stops operating, and the electricity-verification and grounding operation is finished. The electricity-verification and grounding operation method is convenient and safe to operate.