The invention discloses an X-band variable-polarization microwave front-end assembly. The X-band variable-polarization microwave front-end assembly comprises a cavity, a ferrite switch junction K1, aferrite switch junction K2, a ferrite switch junction K3, a circulator H1, a circulator H2, a magic T and a waveguide segment L1, wherein the cavity is a closed waveguide, the ferrite switch junctionK1, the ferrite switch junction K2, the ferrite switch junction K3, the circulator H1, the circulator H2, the magic T and the waveguide segment L1 are arranged in the cavity by a microwave network formed from a straight waveguide or a bending waveguide, the magic T and the ferrite switch junction K1 and the ferrite switch junction K2 and the ferrite switch junction K3 are connected, the ferrite switch junction K2 is connected with the circulator H1, and the ferrite switch junction K3 is connected with the circulator H2. With the X-band variable-polarization microwave front-end assembly provided by the technical scheme, variable-polarization vibration is achieved; moreover, a plurality of microwave functional components are arranged in the integrated cavity to form the X-band variable-polarization microwave front-end assembly, the microwave loss is reduced, the assembly size is reduced, the reliability is improved, the cost is reduced, and the debugging link is reduced.