This paper presents a parallel FIR(Finite Impulse Response) filter system design ,using PR(Partial Reconfiguration) to change tap of FIR ,which can achieve high flexibility , high performance ,and shorten the time of configuration. In the present thesis, we use the Verilog HDL within Xilinx ISE 9.1i design tool to complete this architecture. After that, we use FPGA for function simulation and verify computation data. Until simulation result is correct , using Xilinx Planahead 9.2 to merge all of the architecture ,it generates full configuration circuit file and partial reconfiguration circuit file. Then, to verify by using iMPACT to download full configuration circuit file to FPGA, and download partial reconfiguration circuit file to observe the advantage of shorten time of configuration by using partial reconfiguration.