Research conclusions: Whether thew aterproo fing construct ion system is reasonable or not is cruc ia l to thew aterproofing construction of the subsurface- excava ted tunne.l The fu ll w aterproo fing w ay w as adopted to th is tunne.l That was to take the wa terproof of the tunnel structure as princ ipalw aterproo fing w ay and take add itionalw aterproof as the aux iliary w aterproo fing w ay. Themorew orks w ere focused on improv ing the w aterproofing quality o f the tunnel structure, such as improv ing the qualit ies of the construction sea,l de formation sea,l w all tube and reserved ho le on the structure. In th isw ay, the good w aterproofing effect o f the tunne lw as achieved and the construction quality and sa fety o f the tunnelw ere ensured.