The time-dependent effect for reinforced concrete T-shaped section beam exposed to fire was analyzed in this paper. Based on fire test of building structure home and abroad, combining crack criteria and nonlinear constitutive relationship, finite element analysis method was put forward. Analyses were performed to study the influence of several parameters on the fire resistance of reinforced concrete T-shaped section beam exposed to the IS0834 standard fire,which it included fire time and ratio of reinforcement.The studied results indicate that: section distribution gradient width has a gradual expanse from outside to inside with extension of fire time, time-dependent curve of deflection for reinforcement concrete T-shaped section beam fundamentally decreased linearly with extension of fire time; deflection is nonlinearly increased with load ratio; oblique crack is liable to occur relative to vertical crack.