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FPGA could improve the flexibility and versatility of G.SHDSL interface and reduce the cost of implementation and maintenance. In this paper, the ITU-T Recommendation G. 991.2 is analyzed, the hardware platform with Xilinx Spartan-3 FPGA is built and the methods of implementing modules of G.SHDSL are researched on. Finally, the G.SHDSL interface based on FPGA was designed with Xilinx ISE 14.6 and AFE1230 analog front-end. The interface allows users to implement the dynamic configuration and updates by modifying the program code and system input, which solves the problem of traditional G.SHDSL interface. Proved by the simulation result, the interface can work stably and reliably and will provide a reference to the design of other signal interface.