Recently, the utmost need for underground space in developed urban cities and its associated environment problems are attracting a considerable attention. Among underground structures, subsea tunnels contribute a momentum for formulating an international transportation system. Since the specific working conditions for subsea tunnels such as extremely high water pressure, which is impossible to apply the traditional chemical feeding methods, constructing the subsea tunnel requires special engineering techniques. In past decades, the artificial ground freezing(AGF) method with its advantage of being friendly with environment has become an effective alternative to the traditional methods in constructing the subsea tunnel. Technically, the AGF method consists of two stages: establishing the freezing system, e.g., refrigerant tank and cooling pipes, and freezing process by mean of circulating the coolant through the cooling system. After freezing stages, the pore water is converted to ice phase and works as a bonding agent to enhance the strength and reduce the permeability of soil. At this time, the frozen soil is sufficiently stable and impermeable to provide a temporary construction field. Therefore, in order to improve efficiency of the artificial ground freezing method, especially in subsea conditions, thermal properties of soil, as well as, the mechanical behavior of frozen soils should be well defined. This study focuses on the mechanical properties of soil, e.g., the strength and initial Young’s modulus of frozen and thawed state, by carrying out a series of freezing triaxial tests. Along with the experiment, a circular cross passage in the subsea tunnel construction stage was numerically simulated by the commercial FE program, ABAQUS, to estimate the influence of various factors such as the coefficient of earth pressure, the thickness of overburden, water pressure, and tunnel diameter on the tunnel convergence. In addition, the parametric analysis was performed to identify the effect of mechanical properties of frozen soil on the tunnel convergence in greater depth. Finally, the optimum section of concrete lining was proposed according to the obtained numerical results including the axial force, shearing force and bending moment.