Abstract: In the millimeter-wave massive multiple-input multiple-output (Massive-MIMO) system, the analog precoding algorithm with low-resolution phase shifter has a high algorithm complexity. To cope with the computational complexity problem, an improved iterative phase hybrid precoding algorithm is proposed. It decomposes the analog precoding optimization matrix into column vectors one by one, and uses the second-order rank matrix to obtain the suboptimal optimization function approximately. Then, the optimization function is transformed into a summation form and the optimal phase is obtained by iterative convergence. Meanwhile, in order to maximize hardware efficiency, an analog beamforming scheme with 1 bit resolution phaser is designed. Theoretical analysis and simulation results show that the proposed algorithm has lower computational complexity and improving spectral efficiency.