A support frame is provided for packaging a liquid crystal glass panel. The support frame includes four corner pieces, upper connection bars, and lower connection bars. The upper connection bars are connected to top ends of the corner pieces to form an upper sub-frame. The lower connection bars are connected to bottom ends of the corner pieces to form a bottom bracket, which includes a lower sub-frame corresponding to the upper sub-frame and a carriage rack located inside and connected to the lower sub-frame. The support frame is rigid and may reinforce a tray against deformation caused by stacking or handling trays. The support frame is of a knockdown arrangement composed of multiple components in such a way that a portion of the components may be shared for contained products of different sizes so as to reduce the manufacturing cost.