Abstract: In order to satisfy the miniaturization and low power consumption demand of deep space mission, the multi functions and multi modules multiplexing techniques are indispensible. This paper presents the full duplex / half duplex and simplex merging method based on CCSDS proximity-1 protocol, which strips the flowing processing parts and special function parts from the main architecture, merges them together and forms the global VHDL part. As for the other control and management parts, they are integrated in MicroBlaze architecture of FPGA. The global VHDL part means the resource arrangement is optimal, and all kinds of modes could be changed flexibly because of the MicroBlaze architecture. This method will be used in the proximity transceiver of next generation. By using the conception product which embeds 1 Xilinx VIRTEX5 chip, real test result shows that the presented method performs well and the resources needed are 5% ALMs, 6% DSP and 8% RAM.