Through the test of artificial frozen soil of cretaceous formation soil sample, study the mechanical properties and thermophysical properties of cretaceous formation artificial frozen soil with different soil properties and subzero temperatures. Results indicate that, uniaxial compressive strength of artificial frozen soil of cretaceous formation soil sample linearly increases accompanied with drop in temperature, with identical soil properties and water content; with decreasing temperature, elastic modulus increases and Poisson’s ratio decreases, in the case of the identical soil and ambient temperature; with decreasing temperature specific heat of artificial frozen soil decreases and thermal conductivity increases.