Gage disc cutters installed on the edge of cutterhead of fullface tunnel boring machine (TBM) are subjected to complexity of stress due to the bad working conditions. Nonlinear dynamic models are established by using ABAQUS software so as to study the influence of layout parameters on stress of gage disc cutter; and the stress on the TBM gage disc cutter is analyzed. The results show that: 1) The stress on the gage disc cutter during rock breaking varies violently. 2) The installation angle and transition arc radius have a significantly influence on the stress of gage disc cutter. 3) The stress on the gage disc cutter increases approximately linearly with the installation angle and transition arc radius increase.