使用拟牛顿 ( Newton)算法 ,不用计算 Jacobi矩阵 ,保留了 Newton法的超线性收敛特性 ,是求解大规模非线性方程组的有效方法。文章提出了应用拟 Newton法快速求解电路周期稳态响应的拟 Newton打靶法和拟 Newton谐波平衡法。实验结果表明 ,拟 Newton打靶法和拟 Newton谐波平衡法具有较高的计算效率 Using Newton algorithm, without computing Jacobi matrix, the Newton method retains the superlinear convergence property and is an effective method to solve large-scale nonlinear equations. In this paper, quasi-Newton method and quasi-Newton harmonic balance method are proposed to simulate the steady-state response of the circuit by Quasi-Newton method. The experimental results show that quasi-Newton method and quasi-Newton harmonic balance method have higher computational efficiency