The utility model belongs to the technical field of radar and communication electronics, concretely relates to compact structure's constant temperature transceiver module. The utility model discloses a casing and apron, the casing encloses into hollow cavity with the apron, the inside of cavity has set firmly the thermostatic control board, one side that deviates from the cavity of casing is provided with radiator unit, radiator unit keeps away from the radiator that casing one side set gradually heat sink, semiconductor refrigeration piece and had the fin from being close to a casing side direction. This transceiver module compact structure has adopted the structure of design with constant temperature and light -dutyization. The utility model provides a casing and radiator adopt aluminum alloy, have alleviateed the weight of device, and the size and orientation of the arrival current voltage through adjusting the semiconductor refrigerating sheet adjusts refrigeration or heating capacity, has reached homothermal purpose.