The invention discloses a high-isolation microwave transceiving assembly, which comprises a box body, a cover plate covering the upper surface of the box body, and a circuit board arranged in the boxbody, wherein the circuit board comprises a printed board and corresponding devices; the circuit board can be divided into a transmitting unit, a receiving unit, a power supply unit, a power amplification unit in the transmitting unit, a local oscillation unit and a local oscillation channel; the receiving unit and the transmitting unit are isolated by means of a first interdigital type blockingwall structure; the power amplification unit is isolated from the rest devices by means of a second interdigital type blocking wall structure; the local oscillation unit is isolated from the rest devices by means of first grounding holes in the printed board and a third blocking wall on the cover plate; and the printed board is implemented by adopting a mixed compression board. The high-isolationmicrowave transceiving assembly has the advantages that: the high-isolation shielding structure is provided by adopting a manner of attaching the blocking wall in the box body to the blocking wall onthe cover plate in an interdigital mode and combining the blocking wall on the cover plate with the grounding holes, and a simple and practical isolation method is provided for isolation of a high-performance transceiving microwave system.