In order to further improve the optical coupling efficiency and output power of the optical module, a 400G optical transceiver module is designed and optimized. A passive device with a lens is used as an important part of the optical coupling to improve the coupling efficiency. The input/output buffer information specification(IBIS) model is used to analyze and optimize the high frequency circuit of optical module. Finally, the optical design, link simulation and test of the optical module are carried out. The test results show that the designed optical transceiver module eye image is clear, the optical eye image jitter is about 2.3 ps, each channel has a good consistency, no error code within 202 s. After the signal is transmitted for 100 m, no packet loss occurs, and the system performance is stable.