Based on the urgent need of T/R module engineering in microwave broadband active phased array system, an X-Ku band broadband high-performance and high-integration T/R module with eight channels is proposed in this paper, aiming at solving the problems of traditional T/R module, such as insufficient bandwidth, large size, poor stability and low precision of phase shift and attenuation. The T/R module is realized basing on the breakthrough of eight channels module architecture design technique, high-density integrated design technique based on LTCC entire board, high reliability and high efficiency and heat dissipation design technique of broadband GaN power amplifier, high-frequency broadband high isolation cavity effect design technique, modularization design and mass manufacturability design technique. The main functions of transceiver amplification, amplitude and phase control and safety protection are obtained in this module. The measured results show that the output power in the whole frequency band is ≥ 23.9W, the noise figure is ≤ 3.52dB, the phase shifting accuracy is ≤ 4.87° (RMS), the attenuation accuracy is ≤ 0.87dB (RMS), the standing wave ratio is ≤ 2.0, and the efficiency is ≥23%. Among them, the working bandwidth index increases from 10-12GHz and 15-17GHz to 10-18GHz, the output power increases from 10W to 20W, and the noise figure decreases from 4.3dB to less than 4.0dB. This module has the characteristics of high frequency, wide band, high efficiency and high integration. It can be used in new integrated sensor radar system, multifunctional integrated electronic system, etc.