The hanging flag and double-sided hanging flag curling in shopping malls are closely related to the material used to make the hanging flag and the change of ambient temperature. Generally, shopping malls, supermarkets, 4S stores and other places use PVC materials or paper hanging flags. Careful observation of users will find that these materials will deform with the repeated changes of temperature and humidity. If it is necessary to make hanging flags for long-term use and pay more attention to effect and quality, the best solution to solve the curling deformation of hanging flags is to use various heat transfer fabric materials.