Abstract: The vierendeel-truss string structure is a new type of pre-stressed steel structure． Because there is no oblique web bar in the top truss，so the structure looks very tidy． The lower part consists of high-strength cables． The upper truss and the cable are connected by bracing strut． Through analyzing a real project，it was studied the establishment of the prestressed dynamic model of such structural system，as well as the calculation of construction simulation．