The key problem of the present design and construction of large-scale complicated projects is the construction mechanical analysis of structure construction. Pre-analysis of construction process by means of construction mechanics may not only select the optimal construction plan of construction,but also compare with synchronous actual data of construction,which guarantees a safe and smooth construction.By means of establishing FEA model based on a full process simulation analysis of the main structure construction of the Palms Together Dagoba of Famen Temple,the article makes the tracking simulation analysis of the whole process of the structure construction,educes the pre-set tuning value,draws the displacement varying curve of the structural keys,and compares with the actual data,in order to guarantee the structure security of the construction process and to meet the design requirements of the internal force and configuration of the structure at completion.