Protective device for stairs and control method thereof

The invention discloses a protective device for stairs, and relates to the technical field of safety protection, the protective device is arranged on the stairs, and the protective device comprises first protective mechanisms arranged on the two sides of the stairs respectively and a second protective mechanism connected with the first protective mechanisms; the first protection mechanism comprises a plurality of railings arranged on one side of the stair, and stair railings rising along with the stair are arranged on the railings; the second protection mechanism comprises a springback assembly connected with the first protection mechanism and a protection rod connected with the springback assembly, and the springback assembly is used for driving the protection rod to rotate, so that the protection rod rotationally moves to a protection state parallel to the stair, or the protection rod rotationally moves to a passing state parallel to the stair handrail. The technical problem that in the prior art, in the cl