The invention discloses a VC12 particle scheduling capacity test method for a power ASON system. The test method comprises three steps of ASON network configuration, policy configuration and policy verification. An ASON networking environment is built by 4 devices and is connected with a ring topology through a 2.5-G/10-G line interface. The policy configuration step includes background capacity VC12 virtual-path configuration and dynamic rerouting VC12 virtual-path configuration. The policy verification step includes VC12 scheduling particle service monitoring and network management system service status monitoring. According to the invention, on the basis of the strategy of static background capacity configuration and dynamic verification, whether a few of dynamic rerouting services carry out rerouting based on a configuration strategy or are interrupted is verified to determine dispatching particles and related capacities and a few of instrument resources are needed. With the VC12 particle scheduling capacity test method, the requirement on testing instrument resources by the scheduling particle and capacity testing of the power ASON system is reduced; the testing steps are simplified; and the testing efficiency is improved effectively.