Window scraping device

The utility model discloses a window scraping device which is good in sealing performance and capable of enabling a scraping piece to be tightly attached to a window all the time. The window scraping device comprises the scraping piece, a positioning sleeve with a positioning cap at one end and at least one positioning sleeve sealing ring arranged on the positioning sleeve in a sleeved mode, and a fastening nut is arranged at the other end of the positioning sleeve through threads. A rotating fulcrum shaft is movably arranged in the positioning sleeve, and at least one rotating fulcrum shaft sealing ring is arranged between the rotating fulcrum shaft and the positioning sleeve; the inner end of the rotating fulcrum shaft extends out of the positioning sleeve and is provided with a limiting cap, the outer end of the rotating fulcrum shaft extends out of the positioning sleeve and is provided with a compression nut with a handle through threads, and a pre-tightening spring is arranged between the compression nu