The invention relates to a sliding door window sash and relates to the technical field of doors and windows. The sliding door window sash comprises a door window, a door window frame and a track, wherein the track is installed in the door window frame, pulleys are arranged on the door window and located in the track, a removal assembly is arranged at the end, located in the track, of the door window and comprises a baffle attaching to the side wall of the track, a shoveling piece, attaching to the bottom wall of the track and a separation sheet arranged on the baffle and dividing the baffle into two portions, a through hole identical to the baffle in size is formed in the other side wall, away from the baffle, of the track, a T-shaped groove is formed in the end, located in the track, of the door window and is formed in the width direction of the track, a T-shaped block matched with the T-shaped groove is arranged at the upper end of the baffle, an elastic assembly is arranged on the baffle, and a waste collecting groove is formed in the side wall of the track and located below the through hole. By adopting the arrangement, when impurities in the track are cleared, a user can remove the impurities in the track without manual clearing, and a convenient cleaning effect tis achieved.