With ice accretion of the pipeline suspension bridge, the shape and quality of the suspension bridge will change significantly. Under wind load, unstable vibration may occur. In this paper, by changing the pipeline diameter, rainfall and other factors, the formation process of ice shape of the circular pipeline section is summarized. Taking one pipeline suspension bridge as the research background, the wind tunnel test is worked to study the aerodynamic characteristics of the stiffening girder section of the pipeline suspension bridge and its Reynolds number effect. The results of the study show that the ice shape change process with increasing of ice thickness is crescent shape→D shape→sector shape; The crescent-shaped ice has little effect on the static aerodynamic force coefficients, while the sector-shaped ice has a great impact on them；Within the range of Reynolds number 0.89×10^5~1.45×10^5, aerodynamic force coefficients of two typical sectional models with ice accretion have Reynolds number effect, and the Reynolds number effect is negligible when the Reynolds number is greater than 1.45×10^5.