To improve the online screening effect of tobacco stem, and ensure quality of the processing materials of fibriform stems in slim cigarettes, a new type of stem screening device is designed by using high-frequency and low-intensity vibration technology, which has been applicated online. The device is mainly composed of a two-stage tank body, a plurality of sets of strip screens and vibration motors, realizing reciprocating motion of the classifier by high-frequency and low-intensity vibration force. The device has high vibration frequency, good screening effect and low energy consumption, which is a stepped stem classifier with high frequency satisfying the continuous screening of stalk epidermis flap and slim stem. The application results show that the screening rates of the device to stalk epidermis flap and slim stem are both higher than those of the flat classifier, suggesting the new stem classifier is more efficient to screening stalk epidermis flap and slim stem.