With the continuous development of the research on next generation wireless communication, Massive MIMO has become the focus topics of the academic and the industry. The channel model is suitable for a nonline of site (NLOS) Rayleigh flat fading channel of Massive MIMO system which has a large aperture array at the base station. And according to the Nearflied effect and nonstationaries over the large aperture array of Massive MIMO system, we improve the convention nonline of site (NLOS) channel model. In the system simulation, we using a 128 element linear array at the base station and calculate the steering matrix of transmit array with strict wave path difference between different antenna element. Then we can obtain transmit correlation matrix and generate the corresponding channel matrix by Kronecker channel model. The paper compared and analyzed the effects of different precoding methods and scatters on channel capacity. The channel construction and analysis can more accurate on representing the channel characterizes of Massive MIMO, which has the strong theory value and the practice significance.