Traveling speed and structure gauge are critical factors that have great impact on the construction scale and operation safety of Yangtze river crossing shield tunnels. Taking Taizhou Yangtze river crossing tunnel as project case, the paper makes expatiations on the transverse width of the structure gauge of the tunnel in respect of the driving features inside tunnels, traffic safety, foreign and domestic practices, traffic passing capacity and construction cost. On basis of the composition of the traffics, the paper furthermore recommends feasible options of structure gauges and traveling speeds for Taizhou Yangtze crossing shield tunnel.