本文主要介绍了有限脉冲响应数字滤波器（FIR）和无限脉冲响应数字滤波器（IIR）的原理与程序的设计，同时利用LABVIEW软件将不同滤波器在不同参数下的幅频和相频特性曲线进行直观的显示，从而使滤波器的设计简单易懂。通过比较不同方法实现的滤波器幅频和相频特性曲线，得出了各个滤波器滤波的优缺点。-This paper describes the finite impulse response digital filter (FIR) and infinite impulse response digital filter (IIR) Principles and procedures for the design, while using LABVIEW software will filter under different parameters of different amplitude and phase frequency characteristic curve for visual display, so that the filter is designed to be simple and understandable. By comparing different methods to achieve the filter amplitude-frequency and phase-frequency characteristic curves, obtained the advantages and disadvantages of each filter is filtering.