Fuente: WIPO "tobacco agriculture" The utility model discloses a portable flue-cured tobacco plant height measuring scale. The ruler comprises a first ruler, a second ruler, a third ruler and a plant height pointer, wherein one end ofthe first straight ruler is connected with a rotating shaft at one end of the second straight ruler, the third straight ruler is connected with a rotating shaft at the other end of the second straightruler, the first straight ruler and the third straight ruler can rotate around the rotating shaft to be folded and unfolded, and the plant height pointer is vertically arranged on the first straightruler and can slide along the length direction of the first straight ruler. The ruler is simple in structure, universal, convenient to carry and operate and small in measurement error.