The utility model discloses a tunnel inspection shaft with anti function of floating sluices, including inverted arch filling layer, tunnel invert and the central drain pipe of setting in the inverted arch filling layer, form the inspection shaft in the inverted arch filling layer, tunnel invert is passed through to the inspection shaft degree of depth, reserves the outlet in the inspection shaft bottom plate of inspection shaft, the warning pipe has been inserted in the outlet, inspection shaft lateral wall and central drain pipe intercommunication. The utility model is suitable for an in rich irrigated land section railway tunnel engineerings such as fault, karst growth, can prevent effectively that the too big ballastless track of causing of tunnel internal cause basement water pressure from arching up, ensured the safety operation of railway, the utility model has the characteristics of the construction is simple, the investment is little etc, application prospect is wide, and the construction operation is very simple, and engineering cost is extremely low.