The current distribution network protection terminal platform still adopts a closed architecture, and incurs a high licensing price of the platform operating system as well as a closed development environment. This all inhibits the massive demand for distribution network protection and control services. Considering developers' code isolation requirements and network protection performance constraints, a new platform for distribution network intelligent protection and control terminal based on the Linux real-time operating system is proposed. The new platform has the characteristics of Linux open source, macro kernel, real-time business guarantee and so on. First, this paper embeds real-time patches, designs real-time process scheduling and applies a memory sharing mechanism to a common Linux operating system to construct a new platform foundation. Then, the sampling data real-time processing module and the protection business service module are designed to serve the distribution network protection control application. Finally, by building a software test environment, the real-time processing capability and resampling jitter control capability of the new platform process are verified; by building an RTDS real-time digital simulation system, the network protection application performance under the new platform is verified. The tests all achieve the expected results, which verifies the engineering adaptability of the new platform design.