The invention discloses an anti-clamping device for a skirt plate of an escalator. The inner side of the skirt plate is provided with a detection device and connected with a skirt plate compression device; when compressed, the detection device transmits a detection signal to the skirt plate compression device and an escalator control system; when the skirt plate compression device is loosened, the skirt plate can move inwards freely and the control system stops the escalator; the skirt plate is movably connected with an upper cover plate; and the skirt plate consists of a plurality of skirt plate blocks which are connected with one another through a soft connecting piece. The device has the advantages that: during the normal operation, the skirt plate compression device hoists the skirt plate so as to ensure the safety of passengers; when a foreign matter is clamped between the skirt plate and a stair, the skirt plate compression device is loosened immediately and the escalator stops operating, so that the skirt plate can move inwards freely, the clamped matter can be taken out as soon as possible and the escalator is prevented from further damaging the personal safety and belongings of the passengers; and after the escalator resets, the detection device and the skirt plate compression device reset automatically after receiving the signal and operate normally.