[Purpose/significance] Through the discussion of the subject, and the object of resource sharing, as well astheir mode and security strategy in the network information ecological chain, this paper provides guidance for the resource sharing in the network information ecological chain to promote the coordinated development of the node in the network information ecological chain.[Method/process] Based on the existing related research results, and the information ecology theory, resource sharing theoryby the means of logical analyses, this paper first discussed the range of resource sharing subjects and objects, and their selection strategies in the network information ecological chain. Then it put forward the resource sharing mode and the security strategy in the network information ecological chain.[Result/conclusion] The range of resource sharing subjects in the network information ecological chain can be the node of the same or different functional ecological niche or all kinds of nodes. The object of resource sharing includes information resources, technology resources, human resource and intangible resources. The matching of the subject and object should fully research the resource sharing requirements, reasonably determine the scope and scale of resource sharing, carefully select the subject of resource sharing. There are four types of resource sharing mode: integrated sharing mode, delegate sharing mode, loan type sharing mode and interactive sharing mode.Each type has a specific application model. We should bring up the idea of shareable development, consummate sharing rules and regulations, and perfect sharing coordination organization, in order to ensure the effective implementation of the resource sharing in the network information ecological chain.