The invention relates to the technical field of instruments and meters, and in particular relates to a combined programmable radio beacon simulator. The simulator comprises a PXI case and a controller, and further comprises a high-speed baseband module which is composed of a double-channel 1.25 GS/s and 16-bit DA circuit, has two DA outputs and can complete IQ baseband source output at the same time; the simulator further comprises an L-band dual-channel up-conversion module which is connected with the PXI case and the controller by adopting a PXI bus, and is used for carrying out modulation frequency conversion on the baseband signal output from the high-speed baseband module, filtering, amplifying and attenuating and then outputting the baseband signal, and a radio frequency switch network which is used for completing switching of various analog signals, so that the simulator can multiplex an output port; the simulator further comprises a dual-channel conditioning board card. According to the invention, a modular integrated design is adopted, and online debugging of analog signals is realized by utilizing programming control of an upper computer. Maintenance of simulation equipment is facilitated, and rapid repair of the equipment is met through software self-inspection and module replacement. A computer control technology is adopted, and expansion and function upgrading of the simulator are facilitated.