The invention discloses an automatic stacking mechanism for solar glass tubes and belongs to the field of electromechanical devices. The automatic stacking mechanism for the solar glass tubes comprises an air cylinder base, a supporting rod, a transverse air cylinder, a vertical air cylinder, an axial air cylinder, a ram, a power motor, a reduction gear, a decelerating belt, a
machine tool underframe, a left main transmission rod, a right main transmission rod, a main conveying belt, a left auxiliary transmission rod, a right auxiliary transmission rod, a constant-speed belt, a
toothed belt, a rubber strip and a tube frame. The motor is connected with the decelerating belt through the reduction gear and is installed below the
machine tool underframe, the left main transmission rod is arranged on the side portion of the
machine tool underframe and is matched with the decelerating belt, and the right main transmission rod is connected with the left auxiliary transmission rod through the constant-speed belt. The main conveying belt is arranged between the two main transmission rods, the
toothed belt is arranged between the two auxiliary transmission rods, the supporting rod is arranged on the air cylinder base and used for supporting the transverse air cylinder, the vertical air cylinder is connected with the transverse air cylinder
piston rod, the axial air cylinder is connected with a
piston rod of the vertical air cylinder, and the ram is connected with a
piston rod of the axial air cylinder. The automatic stacking mechanism can complete the automatic stacking work of the solar glass tubes.