Screen window accessory convenient to disassemble and assemble

The utility model relates to the technical field of screen window accessories, in particular to a screen window accessory convenient to disassemble and assemble, which comprises a first installation seat and a second installation seat which are installed on the upper portion and the lower portion of a window frame, and two fixing pieces which are symmetrically installed on the upper portion and the lower portion of a screen sash. A rotating shaft B and a key which are connected with each other are arranged on the front face of the second mounting base, the rotating shaft B and the key stretch out and draw back on the second mounting base up and down, and the rotating shaft A and the rotating shaft B are arranged on the same axis and rotationally connected to the two fixing pieces correspondingly. The first mounting seat, the second mounting seat and the two fixing parts are mounted on the window frame and the screen sash respectively, the rotating shaft A and the rotating shaft B are used for connecting the t