Abstract: Multiple input and multiple output(MIMO) is a key technology to provide high data rate and high spectrum efficiency for mobile communication system. LTE system has defined many MIMO transmission modes to adapt to different application scenarios. Beamforming based on the non-codebook pre-coding is the core technology of TD-LTE, which can make full use of TDD uplink and downlink channel reciprocity characteristics, and significantly improve the system throughput and spectrum efficiency. This paper theoretically presents the performance gap between the two-antenna and eight-antenna in TD-LTE system, and analyzes the possible challenges when eight-antenna beamforming is deployed in commercial mobile network. Then based on the product implementation, the broadcasting beam optimization, compensated channel quality estimation, coordinated SRS, modified multiuser pairing algorithm and receiver enhancement are proposed to improve the system performance, and the 10% to 30% performance gain is achieved.