The invention provides a turbine device with a seal leakage flow guiding function. The turbine device comprises a turbine case and N turbine blade stages. The inner surface of the turbine case is provided with N blade working sections, and each blade working section comprises a static blade outer ring wall, a movable blade outer ring wall and an integral shroud sealing cavity front and back transition section. Each turbine blade stage comprises a static blade, a movable blade and a flow guiding ring, wherein the top of the movable blade is provided with an integral shroud, and labyrinths are arranged on the integral shroud, the flow guiding ring is in a circular ring shape and located on the downstream side of the movable blade, the tail ends of rear transition sections of the turbine blade stages extend toward the connecting positions of the integral shrouds and the labyrinths on the movable blades, and the edges of the inner sides are close to the turbine integral shrouds and the labyrinths but do not make contact with the turbine integral shrouds and the labyrinths. The flow guiding rings guide seal leakage flows to flow, close to the solid surface, inside a cavity formed by the inner wall of the turbine case, the labyrinths and the flow guiding rings, it is avoided that part of fluid of blade lattice main flows invades into an outlet cavity, so that entrainment losses are caused, and mixing losses of the seal leakage flows and the blade lattice main flows are reduced.