The invention discloses an automatic digital government affair service system based on a block chain technology. The system comprises a user layer, an access layer, an application layer, a block chainbottom layer and a block chain resource layer, a distributed event processing flow management module, a work flow management module, a document management module, a public information management module and a personnel information management module are built; according to the digital government affair service system, a block chain bottom layer is constructed on the basis of network resources suchas cloud computing service and network resources; a distributed account book, a intelligent contract and a consensus mechanism bottom layer technology are fused; an open and integral blockchain solution is provided for an upper-layer application; the system comprises a complete blockchain system, a development suite, a development document and matched basic applications and basic services, can realize resource isolation and controllable storage, processing and interaction of data, solves the problems of real-time sharing, authentication change and safe utilization of the data, and effectivelyimproves the data interaction efficiency of data submission, check, query, supervision and the like.