Construction control is an important embodiment of the modernization of the construction industry. In order to ensure the continuous rigid frame bridge require the design of actual state, bridge construction control is an essential measure and step. This paper takes a cross-sea bridge as the basis, using software simulation, exploring the long span continuous rigid frame bridge displacement and stress in various stages of construction, analyzing the parameter sensitivity, supporting for the modernization of the construction industry. Respectively this paper analyzes changing trend and the influence degree of deflection and stress under the biggest cantilever stage and service stage with the change of density of concrete, prestressing parameter and temperature. The results show that local temperature has the biggest influence on deflection under the maximum cantilever stage, and the maximum variation can reach 60mm. Density of concrete has significant effect on deflection, which peak reach between the 10 mm~25 mm under two states.