The invention discloses a self-management terminal file partitioned cache system, and relates to an automatic distribution management system and a work method thereof. In large-scale data collection services, each server caches all terminal files, and consequently the loading performance is poor and memory consumption is excessive. The self-management terminal file partitioned cache system is characterized in that the self-management terminal file partitioned cache system comprises a communication front-end processor, a service processor, a unit code manager and a master station; the service processor is connected with the unit code manager and the communication front-end processor; the master station is connected with the communication front-end processor, the service processor and the unit code manager; the unit code manager is provided with a databank, the unit code manager is used for automatically distributing access terminals to the service processor according to a load balancing strategy, the service processor loads a terminal file distributed to the service processor in a cache, and the front-end processor sends data to the corresponding service processor according to affiliation of the terminals. According to the technical scheme, the service processor loads the terminal file distributed to the service processor only in the cache and does not cache all terminal files, and therefore the loading performance is improved and the memory consumption is reduced.