The high-performance data acquisition system based on FPGA is designed. It not only achieves acquiring 24-route analog signals with maximal frequency of 100 kHz (precision is 16 bits) and 8-route wide-range frequency signal, but also has the ability of data signal processing and the function of fault tolerance and self-examination. The VHDL language is adopted in the FPGA module. The software design and system simulation are completed in the integration circumstance of MAX+PLUSII. The paper provides the simulation figures of main FPGA modules.