The invention provides a support system for rush-repair work order distributing of a distribution network and an optimization method. The system comprises a database, a Hadoop system, a Mahout system, and a data acquisition system. The database stores data collected and processed by the system. The Hadoop system is used for data calculation and storage. The Mahout system is used for work order data mining and scoring. The data acquisition system is used for collecting real-time association data information of work order distributing. In addition, the method comprises: the data acquisition system obtains work order distributing association data information; the Mahout system carries out integration of data from the data acquisition system and the database and calculates an association score between each work order and each rush-repairing individual; the Hadoop system re checks the score and generates a recommendation list; and a rush-repairing individual is selected from the recommendation list and a work order is sent out. On the basis of calculation of optimal selection, a work order is assigned to a first worker or first vehicle arriving at a rush-repairing site, so that the overall rush-repairing efficiency can be improved.