Recently, with the frequent occurrence of collapse incidents, the progressive collapse resistance of structures has been an important matter which could inlfuence public safety greatly. In this article, dismantling component methodis has been to adopted to study the 15 story RC frame-shear wall structure in two buildings (with or without torsional action taken into consideration respectively) by referencing the flows provided by DOD2009.And the nonlinear static analysis is conducted to the two modelsbased on the ifnite element software MIDAS/GenThen, the progressive collapse resistance performance of regular structure and irregular structureis analyzed by the development process of plastic hingesand the inner force comparison before and after the columns dismantlement basing on ifnite element software MIDAS/Gen.