Automatic sorting method for raw material tobacco leaves

The invention relates to an automatic raw material tobacco leaf sorting method which comprises the following steps: raw material tobacco leaves with set grades from a set producing area sequentially pass through a conveying belt of a tobacco leaf sorting system; an image photographing device arranged above a conveying belt of the tobacco leaf sorting system photographs passing tobacco leaves and transmits obtained picture information to a control device; and the control device compares the received picture information with a pre-stored tobacco leaf appearance classification standard picture, respectively transmits corresponding control information to a downstream sorting device, and transfers the tobacco leaves to a corresponding classification conveying belt. According to the technical scheme, the correlation between the corresponding appearance and sensory quality and main chemical components is determined according to the predetermined appearance characteristic difference of the tobacco leaf raw materials,