The process and working principle of automatic book packing in logistic link of library was analyzed. The technical solutions and structural function of for book packing was discussed. New working principle and book packing machine was put forward. The method of book packing using the machine was introduced. The machine has multiple functions of book stack automatic loading and handling, wrapping paper and book stack automatic conveying, automatic wrapping and automatic strapping. It has great significance for improving the efficiency of book packing and strapping. The introduction of virtual prototyping technology to the whole process of the design, which not only can accelerate the product innovation, reduce development costs and shorten development time, but also to inform the system performance in advance to prevent the existence of design flaws, and provides suggestions for improvement and optimization program. The simulation results showed that the power shaft and other key components meet the design and practical requirements.