本文推导了频率随机捷变雷达信号的平均模糊函数，首次给出了该随机序列的模糊函数数学表达式，对其推导过程所采用的主要方法做了叙述，并对结果进行了分析。仿真结果表明，当参数选择合适时，该噪声雷达信号不但具有良好的抗干扰特性，而且可以避免距离模糊。 In this paper, we derive the average fuzzy function of frequency random agile radar signal, and present the mathematical expression of fuzzy function for the random sequence for the first time. The main methods used in the derivation are described and the results are analyzed. The simulation results show that the noise radar signal not only has good anti-jamming characteristics, but also can avoid ambiguous distance when the parameters are chosen properly.