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Based on the avionics system structure of most advanced airplane , this paper put forward a design of multi-modules Remote Data Concentrator based on PCI bus, which uses AFDX as its backbone network , and also have multiple ARINC825 bus interfaces, ARINC429 bus interfaces, sensor and actuator I/O interfaces, implement the hardware and software with multi-interfaces, configuration Pins and table-driven design, which improve the reliability,flexibility and maintainability of Remote Data Concentrator, finally, test the function and latency of the designed RDC, the test results show that the proposed design is a low latency and full functional design.