The invention discloses a falling prevention rest platform which comprises an open supporting beam frame and an inlet portion. The open supporting beam frame is provided with a bottom wall at the inlet portion, and an adapter structure is arranged on one side of the supporting beam frame. The falling prevention rest platform is characterized in that a supporting beam extending portion is arranged at the bottom of the side away from the adapter structure, of the supporting beam frame, and one side of the bottom wall is connected with the supporting beam extending portion. The problem that an inlet of an existing rest platform cannot be covered is solved, the platform for staying of workers is arranged on a platform supporting beam, meets the passing distance requirement of operators and can be effectively closed up when the operators have a rest, and personal safety of the operators is guaranteed.