Research conclusions: The construction methods of the cracked dolomite tunnel in rich-water and high-pressure zone must be chosen scientifically and flexibly. On the premise of ensuring the structure safety, the construction scheme should be optimized as much as possible to cut the construction cost. In general, the full-face curtain grouting technology should not be used because this technology is complex, the construction progress is slow and the construction cost is high. But the construction progress and the construction cost is fairly reasonableby using the bench cut method. Priority should be given to the bench cut method.