Abstract: Based on the discussion of conventional composite lining used in Qingdao Metro hard rock tunnel, the structure form of waterproof single layer lining is proposed. Through analysis of the technical features of this lining and its application advantage in hard rock tunnel, the reasonability of adopting this lining type in Qingdao Metro project is determined. Based on the hard rock tunnel test section project of Qingdao Metro, the design parameters, construction techniques and quality control measures of waterproof single layer lining are studied, and then verified by field monitored results and test data. The results show that: through strict control of construction techniques and operation process, the strength and crack resistance of high strength fiber reibforced shotcrete concrete for waterproof single layer lining meet the requirements of hard rock tunnel permanent support. The application of sprayed waterproof interlayer on the lining solves the poor waterproof and anti seepage performance of shotcrete，and the strong adhesive force of interlayer makes the multi layer shotcrete form a common bearing system. The monitoring data in the tunnel and on the ground of the test section are both relatively stable. Using waterproof single layer lining in hard rock tunnel can avoid some inherent defects of conventional composite lining, and its mechanical property, anti seepage performance and adhesive force strength can meet the requirements of metro tunnels.