High-stability automobile skylight supporting arm

The utility model relates to the technical field of automobile sunroofs. The high-stability automobile skylight supporting arm comprises a supporting arm body, fixed transverse plate, a first mountingseat is fixedly arranged on the left lower side of the fixed transverse plate; a second mounting base is fixedly arranged on the right lower side of the fixed transverse plate; a telescopic connecting rod is fixedly arranged on the back surface, located on the fixed transverse plate, of the second mounting base; a connecting seat is fixedly arranged on the upper side of the first mounting seat; amounting sleeve is fixedly arranged in the middle of the upper side of the connecting seat; the inner wall of the mounting sleeve is rotationally connected with a fixed shaft; the mounting sleeve isconnected with a supporting plate through a fixing shaft; a rotary mounting groove is fixedly formed in the left lower side of the supporting plate; the supporting plate is connected with the telescopic connecting rod through t