Based on the fire test of an existing frame, a finite element model of the testing frame was established. By comparison with the test results, better result of temperature-field simulation was obtained. In addition, considering the systemic design of the actual needs and exploring the effects of distinctive factors on the development of fire, the use of ABAQUS was to simulate the distribution of temperature-field under distinct fire models with varieties of parametric. The results show that: the finite-element software ABAQUS can obtain more precise temperature distribution; considering various random parameters is more conducive to the constructional steel fire engineering.