Abstract: In the overall layout of building the modernization of the national security system and capabilities, the United Front, as an important political advantage and institutional arrangement of the Communist Party of China(CPC), under the leadership of the Party, integrates all social strata, groups and fields. It serves as an essential pillar of the national security operational system, the central axis linking strategic design with systemic functions, and a key driving force within operational mechanisms. The United Front takes as its main axis the "five longitudinal axes"(party relations, ethnic relations, religious relations, class relations and relations with compatriots at home and abroad) and the "four latitudinal axes"(improving the national security system, enhancing national security capacity, raising the level of public security governance, and improving the social governance system), which forms an “longitudinal-latitudinal framework” of coordinated interaction between the United Front and national security. This reflects the coupling relationship of the United Front within the structure of the national governance system.