本文利用一类特殊的一维分段线性混沌系统，来产生具有均匀不变分布函数和δ自相关函数特性的连续混沌信号，这类连续混沌信号经过不可逆变换可生成具有理想保密性的二进制混沌密码序列．本文分析了该混沌系统的有限精度效应并提出一类ｍ序列扰动实现方法．与传统密码序列相比，混沌非线性反馈密码序列不仅具有丰富的源泉，而且设计异常方便，性能易于控制． In this paper, we use a special kind of one-dimensional piecewise linear chaotic system to generate continuous chaotic signals with uniform invariance distribution function and δ autocorrelation function. These kinds of continuous chaotic signals can be transformed into binary chaos with perfect confidentiality through irreversible transformation Password sequence. This paper analyzes the finite precision effect of the chaotic system and proposes a method of m-sequence perturbation. Compared with the traditional cryptosystem, the chaotic nonlinear feedback cryptosystem not only has rich source, but also has anomalous design and easy control.