The invention relates to the field of windows and discloses a bridge-cutoff heat-insulating horizontal pivoting window. The bridge-cutoff heat-insulating horizontal pivoting window comprises a windowframe and a window body mounted on the window frame. The window body comprises an external frame and a glass plate fixedly connected to the external frame. An elastic piece is fixedly connected to theexternal frame, and a guiding plate is fixedly connected to the elastic piece and located at the end, away from the window frame, of the elastic piece. A resetting assembly used for recovering the appearance of the elastic piece is arranged on the external frame. The bridge-cutoff heat-insulating horizontal pivoting window has the following advantages and effects that the bridge-cutoff heat-insulating horizontal pivoting window utilizes a new mechanical structure, by arranging the resetting assembly, the elastic piece and the guiding plate, when abutting against the window frame, the elasticpiece changes the appearance under the effect of the window frame, and the guiding plate is driven to switch states; and when not making contact with the window frame, the elastic piece changes the appearance under the effect of the resetting assembly, thus the guiding plate is driven to switch the states, the guiding plate can shield a gap between the window body and the window frame at any moment, and moisture permeating into a wall is reduced.