The invention relates to an intelligent substation load automatically-distributing method based on distributed electric connection. The method comprises the steps of establishing mathematic models of distributed generation, including the mathematic model of a wind generating set, the mathematic model of a photovoltaic cell and the mathematic model of a stable distributed power supply; conducting load flow calculation on a whole grid according to network and load data acquired by an intelligent substation of the current power grid to which the distributed power supply is connected, and establishing a reactive power optimization model and a network reconstitution model of the power grid to which the distributed power supply is connected when a constraint condition is given; conducting crossing iteration on two subproblems of the reactive power optimization model and the network reconstitution model of the power grid to which the distributed power supply is connected through an iteration computation module in an intelligent substation load automatically-distributing system to approach an optimal solution step by step till automatic distribution of the load of the intelligent substation of the power rid to which the distributed power supply is connected is accomplished. The method can be widely applied to automatic distribution of the load of the intelligent substation.