Provided is a transformer area power supply method capable of meeting a seasonal electricity utilization requirement. The method comprises the following steps: a group of isolation knife switch is arranged on a low-voltage trunk line of an overloaded transformer area, and the transformer area is divided into two groups in an average way via the isolation knife switch according to load capacity; primary sides of a main transformer and an auxiliary transformer are respectively connected with a 10KV line via a primary falling type switch, and secondary sides of the main transformer and the auxiliary transformer are respectively connected with the two groups of transformer areas via a secondary knife switch; when production is in a slack season, the auxiliary transformer is not used, the isolation knife switch between the two transformers are closed, and all loads in the transformer areas are borne by the main transformer; when production is in a busy season, the main transformer and the auxiliary transformer are used simultaneously, and power to the transformer area I and the transformer area II is supplied by the two transformers respectively. Beneficial effects are that: transition via switching can be realized according to electricity consumption and electricity utilization seasons, wherein one main transformer is utilized to bear the loads of the whole transformer areas in the slack season, and each of the two transformers bears half of the loads of the original transformer areas in the busy season so that overload of the single transformer is greatly reduced, normal electricity utilization is ensured for users and power supply reliability is enhanced.