The invention discloses a power supply distribution system for a twin-core electric energy meter. The power supply distribution system for the twin-core electric energy meter comprises a power supply module (1). The power supply module (1) comprises a main power supply (101) with N output ends. The power supply distribution system further comprises M power supply distribution circuits of which input ends are connected with N output ends of the main power supply (101) correspondingly. Each route of the power supply distribution circuit comprises P diodes and Q voltage-reducing and voltage-stabilizing units which are connected clockwise. The output ends of the power supply distribution circuits are correspondingly connected with a management module (401) of a management core of the twin-core electric energy meter, a processing module (302) of a measuring core of the twin-core electric energy meter, a measuring chip (301) of the measuring core of the twin-core electric energy meter and a clock module (303) of the processing module (302) of the measuring core of the twin-core electric energy meter. The power supply distribution system for the twin-core electric energy meter is capable of rationally distributing the power supply through the independent separated circuits, and realizing the reliable and stable running of the measuring core and the management core of the twin-core electric energy meter.