The pattern matching algorithm was mostly implemented based on software, but software realized of low efficiency, a design was applied to make the pattern matching algorithm implementation on the hardware. This paper combines the principle of the Aho-Corasick (AC) algorithm and the characteristics of FPGA, implements the Aho-Corasick (AC) algorithm on the FPGA. Then, it uses the Quartus II to validation and performance analysis for this design. The test results indicate that the design has high quality and is an effective solution to the fault of slow speed.