The invention provides an automatic generation system for automatically generating a main transformer overload 10kV line-to-power supply scheme. The system comprises an identification module, a data reading module, a data processing module, a data analysis module and a display module. The identification module identifies the overload main transformer; The data reading module establishes a data interface with the EMS and the GIS to obtain data of the EMS and the GIS; The data processing module is used for processing the acquired data of the EMS system and the GIS system and establishing a topological relation library; The data analysis module is used for carrying out data analysis on the data of the EMS system and the GIS system, screening out a 10kV line of the overload main transformer and generating an automatic transfer power supply scheme of the overload 10kV line of the main transformer; And the display module is used for visually displaying an automatic power supply conversion scheme of the main transformer overload 10kV line. All systems are connected through interfaces, intelligent comprehensive study and judgment are carried out through big data collection, the working efficiency of the dispatching desk is improved, the safe operation coefficient of a power grid is improved, and reliable power supply is ensured for users.