Side protection device for safety seat

The invention discloses a side protection device for a safety seat. The side protection device comprises a fixed seat, a side protection block and a locking mechanism, wherein the locking mechanism comprises a locking piece, a torsion spring and a spring, the locking piece comprises a limiting plate, a rotating shaft and a limiting shaft, the rotating shaft and the limiting shaft are arranged on one side of the limiting plate in parallel, the side protection block is rotationally installed on the fixed seat through the rotating shaft, and the end, away from the limiting plate, of the rotating shaft extends out of the fixed seat; the length of the portion, extending out of the fixed seat,is larger than the length of the limiting shaft, the fixed seat is provided with a first limiting hole matched with the limiting shaft, the side protection block is provided with a second limiting hole and a third limiting hole which are matched with the limiting shaft, and the torsion spring is arranged on the rotating shaft