The invention provides an optimal dispatching method for an inter-provincial interconnecting line for production analogue simulation. The method comprises the following steps: building a linear time sequence model for power grid transmitting capacity; building the linear time sequence model for transacted total electricity quantity constraints of an interconnecting line between power grids; building a time sequence simulation model for provincial power grids; and optimizing the transacted electricity quantity between the power grids of various time sections to improve the inter-provincial wind power absorptive capability of the power grids. According to the method provided by the invention, the transacted electricity quantity between the power grids of each time section is optimized under the premise of ensuring that the total transacted electricity quantity of the interconnecting line is invariable; inter-provincial mutual absorption of wind power is achieved; the abandoned electricity quantity of the wind power is greatly reduced; the optimization result can provide guidance and advice for power grid dispatching personnel; and the active balance difficulty of a power system is effectively lowered, so that the condition that the power grid efficiently and stably runs is ensured.