Deformation in the orgenesis of the Qinling orogen since the Late Palaeozoic is very important to recon-structing the last assembly process of the North China Plate and South China Plate. To understand this pro-cess, the Mian-Lue suture zone is selected to study the rock assemblages, geometry, deformational sequence, kinematics and dynamics. By synthetic analysis, the main conclusions can be summarized as follows. The Mi-an-Lue suture zone has an ophiolitic melange composed of a series of tectonic slabs of different ages, tectonic settings and origins, such as the basement slab group, oceanic crust slab group, island-arc slab group, accre-tionary sediment wedge slab, and continental margin slab group. These slabs are separated by a series of north-dipping, south-thrusting faults. The current geometry of the suture zone from Kangxian to Gaochuan appears to be an asymmetric, positive flower-shaped architecture consisting of north-dipping, south-thrusting faults in the zone and south-dipping, north-thrusting faults on the north of the zone. However, strike-slipping happened evidently in the Zhuangyuanbei fault and the Kangxian-Lueyang fault, regarded as the northern boundary and the southern boundary of the Mian-lue suture zone respectively. Based on structural analysis of the major faults and slabs, the deformational sequence and tectonic process of the suture zone and its neighbourhood, except for pre-orogenic tectonic evolution, were subdivided into three stages, viz. , subduction-related deformation, colli-sional deformation in the main orogenesis and deformation related to intra-continental adjustment. The fea-tures , ages, kinematics and dynamics of the deformation stages were described in this paper. At last, the com-plex process including indentation, extrusion or escape, strike-slipping and thrusting were summarized in a complete dynamic model.