The utility model relates to a steam turbine seepage anti -overflow goes out device, include, install at least two pipes of buckling in steam turbine bearing box through wires hole department, the pipe of buckling is put line case mount pad through one and is connected with the steam turbine bearing box, put line case mount pad and steam turbine bearing box fixed connection, be equipped with in putting line case mount pad with the through -hole of the union coupling of buckling, the through -hole is equipped with first sealing member with the union coupling department of buckling. The utility model has the advantages of simple structure, sealed effectual, effective solve the problem of steam turbine seepage, guaranteed the safety of using.