Abstract: In order to solve the problem of parameter selection of nonlinear creep model, it is necessary to grasp the change of parameters.The FISH language of that the variation of intensity parameters with creep time in Cvisc model of FLAC3D was proposed. The influence of different cohesion and internal friction angle on thedeformation of accelerated creep was discussed, and a preliminary conclusion was drawn that the strength parameters of Zhanjiang clay were reduced or first increased and then decreased under creep of the condition of high deviatoric stress. It shows that the research contributes to exploring the law of accelerating creep, and has important theoretical significance and practical reference value for the correct simulation of creep phenomenon.