The invention discloses a collection data external distribution system based on distributed business processing and relates to a data distribution system of a power system. At present, according to the collection data external distribution system, business data is uniformly managed, the data is not distinguished usually, the data processing is slow, and demands of corresponding business cannot besatisfied. The system is equipped with a uniform interface service platform connected with an external system. The uniform interface service platform is equipped with an interface application module comprising various corresponding sub-modules according to different data types, different data flow directions and different interaction modes, thereby carrying out distributed deployment. The interface application module comprises a static data distribution sub-module, a real-time data distribution sub-module, an external data obtaining sub-module and a specific interaction interface sub-module. According to the system, on the basis of object-oriented thought, through combination of a WebService technology, the collection data external distribution based on distributed business processing is realized, the data processing is convenient and reliable, and demands of the business are satisfied.