Traditional sachet tea boxing process has the weaknesses wasting human and financial resources. Teabag boxing machine working principle was analyzed. The control system of teabag automatic boxing machine was put forward, which used Siemens S7-200 series PLC as main controller. Hardware configuration and distribution input/ output points of the control system were carried out, and the system software was designed. The control system of teabag automatic boxing machine was designed using PLC, which was flexible system control, reliable operation, reduced costs, and having good practicability.