The present application relates to an organization node chaining method and system based on a blockchain. The method comprises: an alliance master node on an alliance chain acquiring an alliance entry request from an organization node to enter an alliance; in response to the alliance entry request, the alliance master node calling a configuration information interface of a first gateway node by means of an alliance master gateway node of a gateway layer, wherein the first gateway node is a gateway node corresponding to the organization node; the organization node acquiring configuration information of the organization node locally, and sending the configuration information to the alliance master gateway node by means of the configuration information interface so as to return the configuration information to the alliance master node by means of the alliance master gateway node; and the alliance master node adding the configuration information to a system channel configuration file on the alliance chain so as to add the organization node to the alliance chain. The security thereof can be improved by using the method.
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