The work aims to specifically propose a new PET-belt conveyor based on the requirements regarding massive packaging of industrial fiber and cotton. A combined conical conveyor wheel was designed and the taper angle and pressure applied on the conical surface were analyzed and optimized with Adams and Ansys Workbench. The simulation analysis results showed that: when the taper angle of cone pulley was at 9°, the pressure of 30N selected could not only meet the threading requirements, but also effectively mitigate the corresponding stress concentration and vibration strength. For different combined conical conveyor wheels, the taper angle and pressure applied on the conical surface should be carefully selected.