Research conclusions: The application of curve parallel arrangement method in curve bridge, especially in small curve bridge reflects the bridge arrangement advantages of having overpass condition and ship passing requirement, but when application of the calculation mode of curve bridge parallel arrangement for the multiple-span small curve railway bridge, the bridge seam may exceed 30cm or be less than that of design, so it is necessary to adjust the seam according to the real situation. The experience and calculation process of Yongding River Bridge can be learnt for design of other curve bridge with curve parallel arrangement method.