The invention discloses a source network load interaction mode based intelligent power distribution network dispatching service optimization method. The source network load interaction mode based intelligent power distribution network dispatching service optimization method comprises the steps of 1 determining an optimization objective for a system weak link so as to perform initiative optimization according to current network architecture operation state analysis and index assessment of a power distribution network, 2 performing dispatching service optimization, namely optimizing process flows of long-term, medium-and-long-term, short-term, ultra-short-term and real-time all-time-scale dispatching service, 3 performing progressive dispatching service optimization, namely conducting progressive dispatching service optimization on the dispatching service at all time scales from the perspective of the dispatching service. The dispatching service optimization is performed through the process flows of the long-term, medium-and-long-term, short-term, ultra-short-term and real-time all-time-scale dispatching service, the incidence relation of multiple time periods and the optimization objective are firstly determined, and then the planning compilation optimization and optimization scheme arrangement of the dispatching service are performed. The source network load interaction mode based intelligent power distribution network dispatching service optimization method utilizes a source network load interaction mode and operation efficiency optimization and improvement of the power distribution network to achieve overall efficient operation of the power distribution network.