The invention discloses a tea leaf drying device, relating to the technical field of tea leaf machines. The tea leaf drying device comprises a closed tea leaf drying chamber formed by an upper half part and a lower half part, wherein a cylindrical tea leaf drying cylinder is arranged in the tea leaf drying chamber, a tea leaf feeding hole is formed in one side surface of the tea leaf drying chamber, and a heating device is arranged on the inner wall of the tea leaf drying chamber; and the tea leaf drying chamber is driven by a driving device arranged outside the tea leaf drying chamber, and athermal insulation layer is arranged on the inner side wall of the tea leaf drying chamber. According to the tea leaf drying device, the problem that existing drying equipment is poor in drying effectcan be solved.