Universal right-angle splicing structure for doors and windows

The utility model discloses a universal type door and window right-angle splicing structure, relates to the technical field of door and window structures, and is mainly used for solving the problem that a corner connector is loosened after being used for a long time. The window is provided with a hollow first window frame; a plurality of right-angled corner connectors are embedded in the first window frame and are glued in the first window frame, and the first window frame is connected with a second window frame through the corner connectors; the top face of the second window frame is provided with a plurality of grooves allowing the fixing pieces to be inserted therein, one ends of the fixing pieces abut against the top faces of the corner connectors, and the other ends of the fixing pieces are located in the grooves. After the corner connector is embedded into the first window frame and the second window frame, the fixing piece is pressed into the groove through the groove in the second window frame, and fi