Abstract: With the main line of Longhai road viaduct project in Zhengzhou city, factors affecting the stress of bridge deck pavement of PC composite box girder bridge with corrugated steel webs, such as pavement layer thickness, pavement elastic modulus, vehicle load, vehicle impact force, temperature, are being sensitively analyzed with ANSYS. The research results show that vehicle load affects the stress of pavement markedly and the stress is linear with load basically, and vehicle impact force has a great influence on the stress, and pavement layer thickness with pavement elastic modulus has some impact on the stress, and meanwhile temperature changes in the pavement structure causes bigger temperature stress.