There may be a closed relationship between the velocity and the structural style. It is an important material attribute, which is of great significance to understand the deformation and evolution process of nature. Methods: Therefore, combined with field outcrop observation, this study carried out physical simulation test and analysis of different deformation rates of fold —thrust- belt. Results: The results show that: ①High velocity forms a structural style dominated by forward thrust faults, medium velocity forms a structural style dominated by forward thrust fault and backward thrust fault, while low velocity forms a structural style dominated by pure backward thrust fault. ②The difference of structural deformation patterns is mainly determined by the internal stress state of the rock: the forward thrust fault was developed in the hinterland of the fold - and- thrust belt, and the shear stress of the brittle layer is greater than that of the basal ductile layer, while in the middle and front domains, the shear stress of the brittle layer is close to that of the basal ductile layer, mainly forming back thrust and symmetrical pop- up thrust structures. ③The deformation rate of tectonic geological body may determine its existing state.Conclusions:The pudding structure of the coastal area in the south of Portugal and the dominating back thrusts in Cascadian- type margins in North America are likely to be formed under different deformation rates.