The utility model provides a sun-cured yellow tobacco leaf and stem dewatering machine. The sun-cured yellow tobacco leaf and stem dewatering machine comprises a machine frame, wherein a driven wheel and a driving wheel are respectively arranged at the left end and the right end above the machine frame; the driving wheel is connected with a variable frequency motor which is mounted below the machine frame through a planetary gear box; the driving wheel is connected with the driven wheel through a conveying belt; a supporting plate is arranged between the conveying belt and the machine frame; a tobacco leaf groove and a pressing roller are arranged above the conveying belt in sequence from left to right; the pressing roller is fixedly connected with a pressing roller bracket which is mounted above the machine frame through a lifting ring screw and a wing nut; a seam adjustment plate is arranged at the right end of the tobacco leaf groove; the seam adjustment plate is fixedly connected with the right end of the tobacco leaf groove through a tightening screw, and controls the gap between the bottom end of the seam adjustment plate and the conveying belt through the tightening screw. According to the sun-cured yellow tobacco leaf and stem dewatering machine, the mechanization of sun-cured yellow tobacco leaf and stem dewatering is realized; the production efficiency is greatly improved; the damage to tobacco leaves during a dewatering process is reduced.