Abstract: Using FPGA as the main device,a new extensible and high-performance data acquisition module is presented according to the characters of frequency outputting type sensor.In the design,top-down method is used to divide the FPGA to several modules according to functions,the design method and control flows of these modules are also described in detail.Verilog is used to achieve the logic design,simulation and synthesis of FPGA in Modelsim,Synplify and other EDA tools to verify the validity and reliability of the design.