The invention discloses an automatic generation control (AGC) method for real-time sharing of adjustment standby of an interconnected power grid provincial control region. With regard to the running situation that new energy is completely absorbed after grid-connected running of current power grid new energy on a large scale to cause power grid regulation lower standby insufficiency or a part of provincial power grid upper standby at a load peak stage in summer is insufficient, adjustment standby of each provincial dispatching control region is monitored in real time by a separate adjustment side, a control region with insufficient standby is automatically or manually applied to be automatically integrated with an adjacent control region with sufficient standby when the adjustment standbyof the provincial control region is insufficient, area control errors (ACEs) of the two control regions are added by the new combined control region to obtain the ACE of the new control region, ACE allocation and issuing control of the control region are performed according to standby margin, the real-time sharing of the adjustment standby between the control region is achieved, the AGC adjustmentcapability of the whole grid is utilized to the greatest extent, the absorption of the full-grid new energy is promoted, and the running safety of the power grid is ensured.