Connecting structure of aluminum alloy frame

The utility model relates to an aluminum alloy frame connecting structure, and belongs to the technical field of frame connection, the aluminum alloy frame connecting structure comprises a first aluminum alloy frame and a second aluminum alloy frame, the first aluminum alloy frame and the second aluminum alloy frame are vertically arranged, and two supporting limiting plates are arranged in the first aluminum alloy frame; the two supporting limiting plates are symmetrically arranged relative to the middle position of the first aluminum alloy frame, and the structure of the first aluminum alloy frame is the same as that of the second aluminum alloy frame; the supporting limiting plate comprises a horizontal plate and a vertical plate, the horizontal plate is fixed to the inner side wall of the first aluminum alloy frame, the vertical plate is fixed to the interior of the first aluminum alloy frame, a mounting block is placed in a mounting groove of the second aluminum alloy frame and is in interference fit wit