Focused on the large inter-user interference in Multiple Input Multiple Output-Non-Orthogonal Multiple Access (MIMO-NOMA) technology, an algorithm merging user scheduling and BeamForming (BF) was proposed. Firstly, during the course of user scheduling, in order to simultaneously take intra-cluster user interference and inter-cluster user interference into account, all user groupings were initially sparsely processed by the L1-norm regularization method according to the channel difference among users. In the respect of user channel correlation, two users with large channel correlation were divided into a cluster. Secondly, Fractional Transmit Power Control (FTPC) was used to implement the power allocation of the intra-cluster users. Finally, an objective optimization function based on sum rate maximization criterion was constructed, which was solved by Successive Convex Approximation (SCA) method to obtain the BF matrix. Compared with OMA (Orthogonal Multiple Access), the proposed scheme achieves 84.3% improvement in system capacity, and compared with the traditional correlation user clustering method, it achieves 20.2% improvement in fairness. The theoretical analysis and simulation results show that the proposed scheme not only suppresses the intra-cluster interference and inter-cluster user interference effectively, but also ensures the fairness among users.