Geological disaster rockburst occurred frequently in deep and high stress engineering, which affects the safe and efficient construction of the project seriously. A successful rockburst monitoring and warning example is of great significance to rockburst risk control. In this paper, a case study of rockburst monitoring and warning in deep tunnels with complex geological environment in Himalaya was given. The complex geological environment background of the project, implementation of rockburst monitoring, microseismicity monitored, microseismicity in the rockburst development process, rockburst warning method and warning results in the deep tunnels were described. The successful application of rockburst monitoring and warning under the complex geological environment in Himalaya shows that it is feasible for rockburst risk mitigation. The result will be helpful for rockburst monitoring, warning and risk mitigation in similar deep and complex engineering.