Objective: To explore the mechanics index of flexibility of splint fixed belt of different materials.Methods: The flexible biomechanics of cloth tape and plastic straps were detected by using bending length taster.Results: The remove length,bending length,mass per unit area,flexural rigidity between the two materials was significantly(P<0.01).Conclusion: As the splint fixation material,the flexibility of cloth tape was better than plastic straps.