The invention provides a method for constructing DDS communication middleware under a partition real-time operating system. The method comprises the following steps that a VxWorks653-Linux GNU tool isused for compiling and adapting a DDS link library; a Wind River development workbench is used, and a DDS supporting environment is configured in a VxWorks653 system project; a part of operation system bottom layer API support is provided for the DDS in the VxWorks653 system partition; an rtidsgen tool is used for generating codes, and a DDS application API is packaged as a function of initialization, sending, receiving and the like. According to the invention, networking communication between the partition real-time embedded operating system and other equipment can be realized through a datadistribution service, and a technical basis is provided for modular design of a security and task key system and loose coupling communication between modules.