The utility model discloses a simple tobacco leaf grading reference box, and belongs to the field of tobacco grading. The tobacco leaf sample box comprises an upper box body and a lower box body, theupper box body and the lower box body are connected through a rotating shaft hinge and locked through a buckle, a tobacco leaf sample card and a tobacco leaf grade annotation card are arranged in theupper box body, and scales and a benchmark ruler are arranged in the lower box body. The tobacco leaf specimen cards and the tobacco leaf grade annotation cards are contained in the foldable box body,the size is small, carrying is convenient, a grading worker can compare and grade tobacco leaves anytime and anywhere, grading annotation is detailed, and the grading accuracy and efficiency are high.