Demolition by blasting is still the first choice for tall buildings due to the characteristics of economy,efficiency and low safety risk.However,the improvement of construction technology,safety and environmental protection requirements has brought new challenges to the demolition of urban blasting because of the complex surrounding environment and complex building structure forms.In order to optimize the blasting scheme,at present,the forward numerical simulation research is mainly based on the blasting theory and numerical model,while the analysis of the collapse process which is of great significance to the study of collapse mechanism is rarely done.To explore the orientation of blasting demolition of frame shear structure building movement and the collapse of the law of the dumping process,combining with a 22 floors frame-shear structure for blasting demolition of buildings,builting a set of economy applicable image acquisition system,successfully taken out a set of suitable for dumping process analysis of high-definition pictures in a row,using the existing mature AutoCAD software platform and combined with secondary development,An image analysis framework is established to extract the spatio-temporal data of a specific observation point.Through calculation and analysis,the time history curves of displacement,velocity,acceleration,instantaneous velocity and instantaneous acceleration of the observation points are drawn,which reveal the downward motion law of the blasting dumping vibration of the frame-shear structure building,and the disintegration mechanism of the structure failure caused by the impact overload of more than 20 g at the internal joints of the building during the falling process.The motion trajectory formula of the observation point on the roof front during the toppling process of a similar frame-shear structure building is fitted.According to the height of the front point of the roof during the toppling process,the horizontal displacement of the roof during the toppling process can be predicted,and the collapse range of the building can be predicted finally.The related analysis process,data results and collapse prediction model can provide reference for the prediction of the collapse range of buildings with similar structures.