本文提出了一种利用高级语言模拟有限字长定点运算的方法。它可以准确模拟有限字长效应对各种数字信号处理系统的影响。通过利用高级语言-C语言,使该方法不受计算机硬件的限制,有较强的通用性;而且因在整个模拟过程中全部采用整型量运算而使运算速度大大快于Roberto、A Pepe等人提出的方法。 This paper presents a method of simulating finite-word-length fixed-point operations using high-level languages. It accurately simulates the effects of finite word length effects on various digital signal processing systems. Through the use of high-level language-C language, this method is not subject to the limitations of computer hardware, has a strong versatility; and because of the entire simulation used in the whole operation of the integer and make the operation much faster than Roberto, A Pepe, etc. People put forward the method.