The work aims to propose a design method of plastic packaging structure suitable for all kinds of shells. Aiming at the different requirements of different shells, two kinds of overall packaging structures of "inner packaging + cushioning packaging + outer packaging" and "cushioning packaging + outer packaging" were put forward. The design methods of inner packaging and cushioning packaging structures were concluded and summarized. The outer packaging functional structure design method was described in detail, and other details of the design of the packaging structure were described. The design methods of general packaging, inner packaging, cushioning packaging and outer packaging and other structures were presented herein, which were applicable to the structure design of plastic packaging for all shells. The design methods of the plastic packaging structure for shells proposed herein are effective and can provide reference for the personnel who design plastic packaging for shells in the future.