Abstract: In view of the characteristics of soft rock tunnel in the slope road of Sijiaying Iron Mine that is not impacted by mining，the technology of once shotcrete rockbolt mesh-secondary channel steel trellis is put forward for rigid support. This paper introduced the principle and technology of the support in this slope road in detail，and the summarization and discussion on this issue are made. The practice proved that the technology is obviously good for improving the construction speed，security and economic benefits of soft rock tunnel. It provides a good reference for the support of soft rock tunnel.

Key words: Soft rock tunnel, Shotcrete rockbolt mesh, Channel steel trellis, Secondary support