In Long Term Evolution-Advanced ( LTE-A) system，existing coordinated multi-point ( CoMP)multiuser precoding algorithm can not suppress multi-user，intra-user and noise interference at the same time and itscomputational complexity is high. To solve these two problems，an improved linear precoding algorithm isproposed. Computational complexity，system capacity and bit error rate ( BEＲ) as the indicators were used toevaluate the algorithm performance. We established coordinated multi-point multi-user system model，gave theimproved algorithm specific implementation steps，theoretically analyzed computational complexity of the algorithm，and used MATLAB to simulate system performance. Simulation results show that the proposed algorithm can reducecomputational complexity and bit error rate to some extent，and the system capacity performance of the proposedalgorithm is slightly inferior to that of regularized block diagonalization algorithm.