Abstract: Studies on the optimization of the desktop deduction of emergency plans for large-scale blackouts have been done in accordance with the relevant requirements of the "Fundamental Specifications for Emergency Exercises of Work Safety Accidents", in connection with the construction of large-scale blackout emergency response system in Xianyou County, Fujian Province, it presents the innovative form,contents and process of desktop exercise for large-scale blackout events, improves and upgrades the pertinence and practicability of emergency plans.