On basis of the construction of Zhenbao tunnel on YichangWanzhou railway, the article introduces the design and construction of fullbreadth invert bridges adopted in the construction of the tunnel, in which railbound hauling system is adopted. By means of the introduced invert bridge, fullbreadth invert concrete casting is conducted with the present machinery and equipment. The article provides references both for the promotion of fullbreadth invert concrete casting and for the elimination of the operation diseases of tunnels.