In order to solve the problem of difficult design of hybrid precoding scheme for millimeter-wave massive multi-input and multi-output (Massive MIMO) systems, which is not only difficult in hardware implementation, but also with high algorithm complexity, a SIC hybrid precoding scheme based on partially connected structure is proposed. The hybrid precoding research in this paper is based on a simple fixed sub-connection structure, which converts the non-convex problem that maximizes the system reachability into the sum of the antenna sub-array rates, avoiding the problem of large-scale matrix-matrix inversion and singular value decomposition, thus greatly reducing the algorithm complexity. Through algorithm complexity analysis and system capacity performance simulation, the performance of the algorithm can be close to the optimal unconstrained algorithm, and the performance is stable and the algorithm complexity is based on 10% of sparse scattering precoding. Experimental results show that the SIC hybrid precoding algorithm not only has low algorithm complexity, but also meets the system performance requirements.